Model constitution
Regulators publish models for each structure. They are not compulsory, but they carry practical weight.
Applications using an approved model are processed more smoothly, because the regulator does not need to review unfamiliar wording. Not using a model is a named cause of delay in registration.
Where models contain bracketed options — trustee terms, quorum, cooling-off periods — those are choices, not requirements, and the models do not always agree with each other. See drafting your governing document.