4.—(1) A constable (“C”) to be qualified for promotion to the rank of sergeant shall have completed C’s probationary period in the rank of constable.
(2) A sergeant (“S”) to be qualified for promotion to the rank of inspector shall have completed S’s probationary period in the rank of sergeant.
(3) Subject to paragraph (4), in this Regulation—
(a)“probationary period in the rank of constable” means the period determined under Regulation 12 of the Police Service of Northern Ireland Regulations 2005(1);
(b)“probationary period in the rank of sergeant” means the period provided for in Regulation 6(1).
(4) Previous service in a police force in Great Britain or the Isle of Man Constabulary,
which constituted probationary service in the force or constabulary in question shall count for the purposes of this Regulation.