(1) "Claim year" is the fifty-two week period beginning Sunday of the week of:

(a) The date of the birth or placement of a child; or

(b) The date of the filing of a complete and timely application for all other qualifying events.

(2) For applications that are backdated, the claim year is the fifty-two week period beginning Sunday of the week to which the application was backdated.

(3) An employee may only have one valid claim year at a time.