Subsections (2) and (3) apply where—
a supplementary provision is not incorporated as a term of an occupation contract because of an agreement under section 24(1), or
a supplementary provision is incorporated as a term of the contract with modifications because of an agreement under section 24(2).
If as a result it is necessary that another supplementary provision is not incorporated, the other provision is not incorporated.
If as a result it is necessary that another supplementary provision is incorporated with modifications, the other provision is incorporated with the necessary modifications (in addition to any modifications made because of an agreement under section 24(2)).