Procedure for giving notice. —The notice which the Registrar is required by sub-section (3) of section 23 to give to an applicant, shall be sent in Form RG-1 to the applicant at the address for service. The notice shall specify twenty one days time from the date thereof or such further time not exceeding one month as the Registrar may allow on a request made in form TM-M for completion of the registration. Registration