The Board is asking all owners/renters to locate the water shutoff valve for their unit in case of an emergency. It should be located near or behind your hot water tank.
If there is no shut off valve in the unit, we recommend that you have one installed by a licensed plumber.
If the valve in question is a ball valve (straight handle that turns 45 degrees) you should test this valve to make sure it shuts water off to the entire unit.
If the valve is a gate valve (round handle), you should leave it alone as it is likely old and prone to failure and will need replacement by a licensed plumber.
You will need access to the fire alarm panel room to shut the water off to the building.
Picture of the main shut off valve in the fire alarm panel room is below.

Please contact a Board Member or Management for access.