New York Codes, Rules and Regulations
Title 1 - DEPARTMENT OF AGRICULTURE AND MARKETS
Chapter VI - Food Control
Subchapter E - Retail Food Stores (Article 19 Agriculture and Markets Law)
Part 271 - Retail Food Store Sanitation Regulations
Subpart 271-7 - Construction and Maintenance of Physical Facilities
Section 271-7.12 - Cleaning physical facilities-general

Cleaning of floors, walls and ceilings shall be done as often as necessary, but preferably during periods when the least amount of food is exposed, such as after closing. Only dustless methods of cleaning floors, walls and ceilings shall be used, such as vacuum cleaning, wet cleaning, treated dust mops or the use of dust-arresting sweeping compounds with brooms. Floors, mats, duckboards, walls, ceilings and attachments (e.g., light fixtures, vent covers, wall mounted fans and similar equipment), and decorative materials (e.g., signs and advertising materials) shall be kept clean.