Changing the number of parking spots available

[Amber Barrett]

This is the first building my husband and I have owned, and there was some miscommunication at the beginning. I posted the ads for the apartments, which stated that there were two spots available only during snow emergencies, otherwise they would have one spot available to them. He wrote out the lease and wrote in 2 spots. At first there was no problem and they only used one spot, then over the winter we allowed them to have an extra. Now I have asked them to return to the original arrangement and they are saying they want to keep the two spots, and the lease says they get two spots (it does not specify when). Is there anything I can do here, before their lease is up in June, or are my hands tied?