I think you'll find it's called a "religious" covenant... not doing things that clash with divine service. :)
Surely religous people are in church before this time, not out on the allotments?
Sounds a bit stupid to me!
There are fires by me when you want them, not sure what the rules are, I haven't had one yet, but am tempted with all of the couch grass, and then I can put the ash back in. Knowing my luck the ruddy allotment site would go up too!
Cheers
Dave