Disturb a frog's vernal pool habitat: Pay $300. Alter a marsh, meadow, bog, bank, or pond of any size: See you in court. The potential fine and enforcement actions are some of the teeth in a proposed wetlands protection bylaw that would give the Belmont Conservation Commission greater authority over what happens in or around wetlands. The proposal, which voters will decide at Town Meeting on April 24, would reinforce a state law that more than half of the communities in Massachusetts have found lacking in some way. Belmont would join at least 180 others with a new wetlands bylaw,...