term Commissioner means the Commissioner of Social Security. (3) Deputy Commissioner The term Deputy Commissioner means the Deputy Commissioner who heads the Office of Paid Family and Medical Leave established under section 403(a). (4) Eligible individual The term eligible individual means an individual who is entitled to a benefit under section 404 for a particular month, upon filing an application for such benefit for such month. (5) Initial waiting period The term initial waiting period means a period beginning with the first caregiving day of an individual occurring during the individual’s benefit period and ending after the earlier of— (A) the fifth caregiving day of the individual occurring during the benefit period