Form and validity of licence
28.—(1)  A licence must —
(a)be in such form as the licensing officer may determine; and
(b)contain the conditions subject to which it is granted.
(2)  A licence is in force for such period (not exceeding 5 years) as the licensing officer may specify in the licence, starting from the date of its issue.
(3)  A licence that is renewed continues in force for such period (not exceeding 5 years) as the licensing officer may specify in writing to the licensee, starting from the date immediately following that on which (but for its renewal) the licence would have expired.