The maximum number of proxies that can be held is limited by section 26(5) of Schedule 1 of the Act:
(7) Limit on number of proxies that may be held The total number of proxies that may be held by a person (other than proxies held by the person as the co-owner of a lot) voting on a resolution are as follows:
(a) if the strata scheme has 20 lots or less, one,
(b) if the strata scheme has more than 20 lots, a number that is equal to not more than 5% of the total number of lots.
So, in a 600 lot scheme (I know you said more...) the maximum number of proxies any one person can hold is 30.
Apparently this came into effect on 30 November, 2016 from some commentary I found. Prior to that 'proxy farming' was an issue.
(7) Limit on number of proxies that may be held The total number of proxies that may be held by a person (other than proxies held by the person as the co-owner of a lot) voting on a resolution are as follows:
(a) if the strata scheme has 20 lots or less, one,
(b) if the strata scheme has more than 20 lots, a number that is equal to not more than 5% of the total number of lots.
So, in a 600 lot scheme (I know you said more...) the maximum number of proxies any one person can hold is 30.
Apparently this came into effect on 30 November, 2016 from some commentary I found. Prior to that 'proxy farming' was an issue.