Website is here: https://www.gaming.ny.gov/gaming/index.php?ID=0

New York State Gaming Commission makes it clears it has two approved independent testing labs:

Approved independent testing laboratories for commercial and video lottery gaming facilities:
• Gaming Laboratories International, LLC (GLI)
• BMM Testlabs

Slot machines or games for VLT’s have to be approved. These games must be tested first.

You have to read up on the regulations for the state you are interested in.