In this league, there were no restrictions on what players could participate, and some clubs would often field numerous members of the first team in fixtures.
[2] The first team to formally announce their intention to join the Intermediate League was Gibraltar Phoenix, signing 10 players for the new team on 10 June and appointing former Gibraltar under-19 and Mons Calpe manager Terrence Jolley.
[3] However, Phoenix would fold entirely the following season, while St Joseph's withdrew their side mid-season.
In 2020, Boca Gibraltar also formed an U23 team, however they never competed in the league due to the club having its domestic license revoked.
Note: Hound Dogs were granted special dispensation to compete as a senior team in the league.