(1) If, after the date on which an agreement referred to in section 21(1)(b)(i) is signed by the employer and the employee (whether or not the approved remote working arrangement to which it relates has commenced), the employer is satisfied that the remote working arrangement would have, or is having, a substantial adverse effect on the operation of his or her business, profession or occupation, by reason of -

(a) seasonal variations in the volume of the work concerned,

(b) the unavailability of a person to carry out the duties of the employee in the employer's place of business,

(c) the nature of the duties of the employee in the employment, or

(d) any other matters relevant to the substantial adverse effect on the operation of his or her business, profession or occupation,