N.Y.C. Admin. Code § 28-112.9.7: § 28-112.9.7 Validity not subject to challenge in enforcement proceeding.

In any proceedings to enforce or discharge a lien created pursuant to section 28-112.9, the validity of the lien shall not be subject to challenge based on:

1. The lawfulness of the inspection, reinspection, examination, service or permit; or

2. The propriety and accuracy of the fee for which a lien is claimed, except as provided in section 28-112.9.