Updated as of 24/2/2014, rule takes immediate effect:
- All club members have right to park vehicle in base with reasonable requirements
edit: further elaboration of "reasonable requirements":
If you don't have a club base, you are not affected by it and should not worry. If you have a club base and you are allowing members to park in base, whether for free or for a reasonable donation amount, you're also fine.
You can still say "donate 15k per month per vehicle", and limits like "maximum of 3 vehicles per person" or "1 truck, 2 cars per person", and restrictions like "this area is for club vip" or "this area is for trucks". Donation amount must be reasonable, and limits should be fair according to size of base.
These requirements MUST be stated in club noticeboard or club sub-forum (if exists) otherwise you have no right to clamp member vehicles. In addition to clamping vehicles, if you have no club rules at all you are not allowed to remove players due to "Club member can not be removed from club unless they break rules stated in club noticeboard".
All club founders have been messaged in-game about this new rule.