New York Codes, Rules and Regulations
Title 21 - Miscellaneous
Chapter XXIV - The Port Authority Of New York And New Jersey
Subchapter D - Air Terminals
Article 1 - John F. Kennedy International, La Guardia and Newark Airports
Part 1263 - Schedule Of Charges
La Guardia Airport
Section 1263.21 - Public ramp and apron area charges

(a) For an aircraft using the public ramp and apron area designated by The Port Authority of New York and New Jersey for loading or unloading passengers, their baggage, or mail, while such aircraft is actually loading or unloading............ no charge

(b) For an aircraft not actually loading or unloading passengers, their baggage, or mail, remaining on such area for more than 10 minutes after the manager of the air terminal has directed that such aircraft be removed, for each additional 30 minutes or fraction thereof............ $5.00