Where, before or after the date of commencement of this Act, a business is transmitted from 1 employer to another and a person who was, immediately before the transmission, an employee of the first employer becomes, immediately after the transmission, an employee of the second employer—
(a) the period of service of the employee shall be deemed not to have been interrupted; and
(b) the period of service of the employee with the first employer shall be deemed to be service with the second employer.