A shop worker may at any time give to his or her employer a written notice, signed and dated by the shop worker, to the effect that he or she objects to doing shop work for additional hours on Sunday.
In this Part—
"additional hours" means any number of hours of shop work that a shop worker is (or could be) required to work under a contract of employment on Sunday that are (or would be) in excess of the shop worker's normal Sunday working hours;
"objection notice" means a notice given under subsection (1).
The "normal Sunday working hours" of a shop worker are to be calculated in accordance with regulations.
Regulations under this section may provide—
Provision under subsection (4)(b) or (c) may, in particular, include provision—
But regulations under this section may not include provision preventing a shop worker who has been continuously employed under a contract of employment for a period of one year or more from giving to the employer an objection notice.
Regulations under this section may make different provision for different purposes.