An employee-beneficiary's enrollment application, beneficiary designation, or any other form required to be filed with the Fund shall be deemed to have been filed with the Fund on the date that the following entities, as applicable, actually receive such forms:
(1) the employee's employer; (2) in the case of a retired employee, surviving spouse or partner under Rule 3.01, and unmarried child under Rule 3.01, the Fund; (3) or others, as specified by the Fund. However, if filed before the time or times prescribed in these rules, an enrollment application, or other form shall be deemed to have been filed on the date that the person would have been first eligible to file that document.