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@ -15,13 +15,13 @@ The preset dropdown allows you to choose from a hardcoded list of preloaded STV
| Australian Senate STV | Rules from the [*Commonwealth Electoral Act 1918*](https://www.legislation.gov.au/Details/C2020C00400/Html/Text#_Toc59107700), using the unweighted inclusive Gregory method. | [E2] [E3] [E4] | ✓ | | Australian Senate STV | Rules from the [*Commonwealth Electoral Act 1918*](https://www.legislation.gov.au/Details/C2020C00400/Html/Text#_Toc59107700), using the unweighted inclusive Gregory method. | [E2] [E3] [E4] | ✓ |
| Western Australia STV | Rules from the [*Electoral Act 1907* (WA)](https://www.legislation.wa.gov.au/legislation/prod/filestore.nsf/FileURL/mrdoc_29498.pdf/$FILE/Electoral%20Act%201907%20-%20[17-a0-06].pdf), using the weighted inclusive Gregory method. | [E2] [E3] | | | Western Australia STV | Rules from the [*Electoral Act 1907* (WA)](https://www.legislation.wa.gov.au/legislation/prod/filestore.nsf/FileURL/mrdoc_29498.pdf/$FILE/Electoral%20Act%201907%20-%20[17-a0-06].pdf), using the weighted inclusive Gregory method. | [E2] [E3] | |
| Australian Capital Territory STV | Rules from the [*Electoral Act 1992* (ACT)](https://www.legislation.act.gov.au/View/a/1992-71/current/PDF/1992-71.PDF), using the exclusive Gregory method. | | ✓ | | Australian Capital Territory STV | Rules from the [*Electoral Act 1992* (ACT)](https://www.legislation.act.gov.au/View/a/1992-71/current/PDF/1992-71.PDF), using the exclusive Gregory method. | | ✓ |
| Minneapolis STV | Rules from chapter 167 of the [*Minneapolis Code of Ordinances*](https://library.municode.com/mn/minneapolis/codes/code_of_ordinances?nodeId=COOR_TIT8.5EL_CH167MUELRUCO), using the weighted inclusive Gregory method. | | ✓ | | Minneapolis STV | Rules from chapter 167 of the [*Minneapolis Code of Ordinances*](https://library.municode.com/mn/minneapolis/codes/code_of_ordinances?nodeId=COOR_TIT8.5EL_CH167MUELRUCO), using the weighted inclusive Gregory method. | [E5] | ✓ |
| Cambridge STV | Rules in force in Cambridge, Massachusetts, using random sample transfers. These rules are derived from the [former chapter 54A of the Massachusetts General Laws](https://www.cambridgema.gov/-/media/Files/electioncommission/massachusettsgenerallawschapter54a.pdf), but have by regulation been modified to incorporate the procedures set out in Article IX of the former [1938 Charter of the City of Cincinnati](https://catalog.hathitrust.org/Record/001754258). See also [here](https://web.archive.org/web/20081118104049/http://www.fairvote.org/media/1993countmanual.pdf). | | ✓ | | Cambridge STV | Rules in force in Cambridge, Massachusetts, using random sample transfers. These rules are derived from the [former chapter 54A of the Massachusetts General Laws](https://www.cambridgema.gov/-/media/Files/electioncommission/massachusettsgenerallawschapter54a.pdf), but have by regulation been modified to incorporate the procedures set out in Article IX of the former [1938 Charter of the City of Cincinnati](https://catalog.hathitrust.org/Record/001754258). See also [here](https://web.archive.org/web/20081118104049/http://www.fairvote.org/media/1993countmanual.pdf). | | ✓ |
| [Wright STV](https://www.aph.gov.au/Parliamentary_Business/Committees/House_of_Representatives_Committees?url=em/elect07/subs/sub051.1.pdf) | Rules proposed by Anthony van der Craats designed for computer counting, involving reset and re-iteration of the count after each candidate exclusion. | | ✓ | | [Wright STV](https://www.aph.gov.au/Parliamentary_Business/Committees/House_of_Representatives_Committees?url=em/elect07/subs/sub051.1.pdf) | Rules proposed by Anthony van der Craats designed for computer counting, involving reset and re-iteration of the count after each candidate exclusion. | | ✓ |
| [PRSA 1977](https://www.prsa.org.au/rule1977.htm) | Simple rules designed for hand counting, using the exclusive Gregory method, with counting performed in thousandths of a vote. | | ✓ | | [PRSA 1977](https://www.prsa.org.au/rule1977.htm) | Simple rules designed for hand counting, using the exclusive Gregory method, with counting performed in thousandths of a vote. | | ✓ |
| [ERS97](https://www.electoral-reform.org.uk/latest-news-and-research/publications/how-to-conduct-an-election-by-the-single-transferable-vote-3rd-edition/) | More complex rules designed for hand counting, using the exclusive Gregory method. | | ✓ | | [ERS97](https://www.electoral-reform.org.uk/latest-news-and-research/publications/how-to-conduct-an-election-by-the-single-transferable-vote-3rd-edition/) | More complex rules designed for hand counting, using the exclusive Gregory method. | | ✓ |
| • ERS76 | Former rules from the 1976 2nd edition. | [E5] | | | • ERS76 | Former rules from the 1976 2nd edition. | [E6] | |
| • ERS73 | Former rules from the 1973 1st edition. | [E5] | | | • ERS73 | Former rules from the 1973 1st edition. | [E6] | |
| Church of England | Rules from the Church of England [*Single Transferable Vote Rules 2020*](https://www.churchofengland.org/sites/default/files/2020-02/STV%20Rules%202020%20-%20final.pdf), similar to ERS73. | | | Church of England | Rules from the Church of England [*Single Transferable Vote Rules 2020*](https://www.churchofengland.org/sites/default/files/2020-02/STV%20Rules%202020%20-%20final.pdf), similar to ERS73. | |
Exceptions: Exceptions:
@ -30,7 +30,8 @@ Exceptions:
* [E2] When breaking ties backwards, OpenTally selects the candidate who had more/fewer votes at the last stage when *any* tied candidate had more/fewer votes, rather than the method described in the legislation (when each all had unequal votes). The OpenTally developers regard the method described in the legislation as a defect. For an independent discussion, see <a href="https://dl.acm.org/doi/10.1145/3014812.3014837">Conway et al.</a> * [E2] When breaking ties backwards, OpenTally selects the candidate who had more/fewer votes at the last stage when *any* tied candidate had more/fewer votes, rather than the method described in the legislation (when each all had unequal votes). The OpenTally developers regard the method described in the legislation as a defect. For an independent discussion, see <a href="https://dl.acm.org/doi/10.1145/3014812.3014837">Conway et al.</a>
* [E3] A tie between 2 candidates for the final vacancy will be broken backwards then at random, rather than the method described in the legislation. * [E3] A tie between 2 candidates for the final vacancy will be broken backwards then at random, rather than the method described in the legislation.
* [E4] Bulk exclusion is not performed. See the section on *Bulk exclusion* for further discussion. * [E4] Bulk exclusion is not performed. See the section on *Bulk exclusion* for further discussion.
* [E5] The quota is always calculated to 2 decimal places. For full ERS76 (ERS73) compliance, set *Round quota to 0 d.p.* when the quota is more than 100 (100 or more). * [E5] The ‘mathematically eliminated by the sum of all ranked-choice votes comparison’ is not implemented.
* [E6] The quota is always calculated to 2 decimal places. For full ERS76 (ERS73) compliance, set *Round quota to 0 d.p.* when the quota is more than 100 (100 or more).
For details of validation, see [validation.md](validation.md). For details of validation, see [validation.md](validation.md).
@ -195,7 +196,7 @@ When early bulk election is enabled (default), the count terminates as soon as t
* If a proposed exclusion would cause the number of continuing candidates to exactly equal the number of remaining vacancies, all other continuing candidates are declared elected without transfers arising from the proposed exclusion being performed. * If a proposed exclusion would cause the number of continuing candidates to exactly equal the number of remaining vacancies, all other continuing candidates are declared elected without transfers arising from the proposed exclusion being performed.
* At the end of any stage, if *n* vacancies remain and the *n*-th top continuing candidate has more votes than all lower continuing candidates (plus votes awaiting transfer), the *n* top continuing candidates are immediately declared elected. * At the end of any stage, if *n* vacancies remain and the *n*-th top continuing candidate has more votes than all lower continuing candidates (plus votes awaiting transfer), the *n* top continuing candidates are immediately declared elected.
If an early bulk election is performed, further surplus distributions are not performed, and outstanding exclusions, if any, are not completed, even if they could change the order of election. If an early bulk election is performed, further surplus distributions are not performed, and outstanding exclusions are not completed, even if they could change the order of election.
When early bulk election is disabled, surpluses continue to be distributed, and outstanding exclusions continue to be completed, even once the number of continuing candidates exactly equals the number of remaining vacancies. Bulk election is performed only as a final measure once there are no more surpluses to distribute, and no exclusions to complete. When early bulk election is disabled, surpluses continue to be distributed, and outstanding exclusions continue to be completed, even once the number of continuing candidates exactly equals the number of remaining vacancies. Bulk election is performed only as a final measure once there are no more surpluses to distribute, and no exclusions to complete.