I can speak generally to the requirements of section 33 of the charter, which says that a declaration made must be done expressly by the legislature under this section in order to have the effect that such operation of the charter rights would not apply. That the declaration must be done expressly would apply for only sections 7 to 15 of the charter and would apply for only five years.
Understanding that the federal government has never invoked the notwithstanding clause, those are the requirements of form in terms of the declaration needing to be done specifically by the legislature.