At this stage, the Royal Militia Island of Jersey (RMIJ) was suspended for the remainder of the war, and all those Jerseymen within the stated categories effectively became members of the British Army, albeit that they were not part of a particular regiment or corps at the time. There was the period of a month before the Act became law, and during it some 232 Jerseymen took the opportunity to head off to the UK and voluntarily enlist before they were conscripted.

Having suspended the RMIJ, there still remained the need to guard the island's coast lines, harbours and facilities, and therefore two new units were formed to perform the role, the Royal Jersey Garrison Battalion (RJGB), and 110th Company, Royal Garrison Artillery (RGA). Immediately the RMIJ suspension took effect, enlistment into these units began, and editions of Jersey's "Evening Post" in late-February and early-March 1917 record many of those names who joined at that time, having first been medically examined.

There appears to be little in the way of subsequent documentation regarding the RJGB, however, at the time of the Armistice on the 11th November, 1918 a Muster Roll was produced showing the Battalion's organisation, with a Strength of 464 Officers, NCOs and OR against an Establishment of 479, a shortfall of 15 - see Table below. For most NCOs and OR, their regimental number within the RJGB was also listed.