I noticed that the astro division in Raheny is not full yet (5 teams registered so far I think) so I mailed the league asking about what happens if there’s no room.
Reply was:
"We have a few contingencies if the league does not have sufficient numbers.
We will be able to delay the start by a week if necessary.
We can run with 8 teams instead of 12.
We will arrange another league if we do not reach 8 teams."
Obviously we’ll try and register for somewhere else if needs be, preferably Sandymount or as near to town as possible. 8 teams instead of 12 would be fine - just play eachother 3 times.