4G.—A notice served on an employer under section 4A, 4C or 4E may be sent or given to the employer in any of the following ways:

(a) where the employer is a natural person, by sending the notice by prepaid post to the address at which the employer ordinarily resides;

(b) where the employer is a company—

(i) by sending the notice by prepaid post to the registered office of the company, or

(ii) where the company has not given notice to the Registrar of the situation of its registered office, by delivering the notice to the Registrar;

(c) where the employer is a partnership, by sending the notice by prepaid post to the head office or a principal office of the partnership.]