Rent assisted tenants in Strata building

Please advise if possible to prevent units in our building from being rented by investor owners to what appears to be public housing.  We understand that the government is encouraging owners to enter into such agreements which guarantees rent and takes care of any maintenance necessary.  This would be a very nice arrangement for investors but lowers the standard of the building for the three (only) owners who call this their home and will decrease the value of the property as well.  So far one unit is now occupied by ‘rent assisted’ tenant.

We are situated in an expensive eastern suburb of Sydney.

Dept of Fair Trading advised that there is no rule under strata rules preventing this.  Can we raise a by-law preventing owners from doing this and how do we do that?

Look forward to your advice.

Thank you

Worried Owner