Regulations may provide for disqualifying a woman for receiving maternity benefit where -

(a) during the period for which the benefit is payable, she engages in any form of insurable employment, insurable (occupational injuries) employment, insurable self-employment, any employment referred to in paragraph 1, 2, 3 or 6 of Part 2 of Schedule 1 or any self-employment referred to in paragraph 1 or 5 of Part 3 of Schedule 1, or

(b) she fails, without good cause, to attend for or to submit herself to any medical examination that may be required in accordance with regulations made under this section.s