all plotholders to confirm they are happy to have bees on site, you to contact all the householders around the allotments and advise them you are keeping bees there and the beekeeper to agree to immediate removal of all colonies if the committee sees fit
Personally, I wouldn't bother
I wouldn't have bothered either if those had been the requirements, but as bees were already on my allotment (the beekeeper died and no-one volunteered to take them on) I've had no hoops to jump through and have been left alone for twelve years. Started with three colonies and there are eighteen now...
Yes, I pay for the plot (on the edge of the site, against the hedge line) and when Old Bill died on the next plot I took that on and planted an orchard as a flight barrier; I have a 2m mesh and post barrier as well and no trouble from anyone except Anna (two plots over) who was stung occasionally. As the Committee tested the bees by walking in front of the hives, they accepted that Anna's perfume was to blame.
To keep everyone sweet I cut the communal paths occasionally and hold honey sales in the autumn, giving them 20% off market rates and letting them know it. Occasionally a primary school will visit and sit in the orchard listening to the story of pollination.
Of course, a few swarms have hung about over the years: one afternoon a U3A group came to chat and we discovered they were standing next to a silent swarm; they were delighted to see it boxed before they left.
Nowadays councils and associations tend to ask for the Basic Assessment, for proof of attendance at a Beginner Course, membership of a BKA and PLI. Some have had negative experiences of beekeepers and won't have you, others go out of their way and help fund an apiary.
If the Committee or Allotment Officer is hesitant, ask that they give you a trial period of one season; make sure all is sweet for that period, or as Philip said, keep empty hives for a while.