4.—(1) A person who has at any time completed a term of service in the Royal Marines may be re-enlisted for a special term of service in the Royal Marines being a term—
(a)wholly of service in the Royal Marines;
(b)expiring not later than 5 years from the date of his attestation;
(c)to which regulations 6 and 7, and regulations 9 to 11 shall not apply.
(2) Subject to regulation 8, a person who has enlisted in the Royal Marines under this regulation may, at any time during the term for which he enlisted, give 6 months notice in writing to his commanding officer of his desire to be discharged and he shall, upon the expiration of such notice, be so discharged.