"(1) An employee shall exercise her right to return to work by [giving written notice to] the employer (who may be her original employer or a successor of that employer) at least [twenty-one] days before the day on which she proposes to return of her proposal to return on that day (in this section referred to as the "notified day of return")."
"(1) An employee who has a right both under this Act and under a contract of employment, or otherwise, to return to work, may not exercise the two rights separately but may in returning to work take advantage of whichever right is, in any particular respect, the more favourable."