SCA has a copyright on their original contract and its only members of SCA who can access and use the standard contract.
Ridiculous but true … especially when SCA members use this as a reason for not allowing any changes. However, you can turn that back on the SM and say “okay, if we can’t make any changes this is an edict, not a contract, so we need to start from scratch.”
There are other organisations providing contracts for strata managers (I know for example that one of the major strata lawyers in Sydney provides such contract forms to strata managers who subscribe to their services).
The OCN (ocn.org.au) will also offer help with a strata management contract.