registration period
The term “registration period” means, with respect to any employee, the period which begins with the first day for which such employee registers at an employment office in accordance with such regulations as the Board may prescribe, and ends with whichever is the earlier of (i) the thirteenth day thereafter, or (ii) the day immediately preceding the day for which he next registers at a different employment office; and thereafter each period which begins with the first day for which he next registers at an employment office after the end of his last preceding registration period which began with a day for which he registered at an employment office and ends with whichever is the earlier of (i) the thirteenth day thereafter, or (ii) the day immediately preceding the day for which he next registers at a different employment office. The term “registration period” means also, with respect to any employee, the period which begins with the first day with respect to which a statement of sickness for a “period of continuing sickness” (as defined in section 352(a) of this title ) is filed in his behalf in accordance with such regulations as the Board may prescribe, or the first such day after the end of a registration period which will have begun with a day with respect to which a statement of sickness for a “period of continuing sickness” (as defined in section 352(a) of this title ) was filed in his behalf, and ends with whichever is the earlier of (i) the thirteenth day thereafter, or (ii) the day immediately preceding the day with respect to which a statement of sickness for a new “period of continuing sickness” (as defined in section 352(a) of this title ) is filed in his behalf.