21.4.15. If any given provision of this Act refers to this chapter in relation to an operation that consists in the rescinding or revocation of an election, or in an agreement or arrangement, an application, an attribution, a designation, a determination, a distribution or a specification relating to a property, an amount or anything else, this chapter is to be interpreted as if the operation consisted in an election made under the given provision or under the provision of the Income Tax Act (R.S.C. 1985, c. 1 (5th Suppl.)) to which the given provision refers.