Mode of serving notices

A notice in writing given by or on behalf of a landlord or a tenant may be served, (a) on the tenant, by delivering it to him personally, or by leaving it for him at the tenement with some person there residing, or by sending it through the post in a registered letter addressed to the tenant there, or in the case of a company, by delivering it or sending it in a registered letter to the secretary or other proper officer at the registered office of the company; and (b) on the landlord, by delivering it to him or to his agent personally, or by leaving it for either of them at his most usual place of abode, or by sending it through the post in a registered letter addressed to either of them 48 there, or in case of a company, by delivering it, or sending it in a registered letter, to the secretary or other proper officer at the registered office of the company.