One post per person per day.
Lights must proceed in alphabetical order. Allowances may be made for letters such as "Q," "X," "Z," etc.
USA lights only Let's change that to anywhere.
For multi-word lights, i.e. Point Bonita, the light may be used for either P or B.
For Q, X, Z -- any light with that letter in the name is acceptable, doesn't have to start with it.
No lighthouse can be repeated within the thread.
These are the only rules I see. I agree with Laura, can't weasel out of this one Loon.