Provision in a will on a small multi-family property

[Mike Daly]

Here's an odd one: I'm working on a deal to acquire a small multi-family in New York state. The current owner inherited the property from his father. In the father's will, there was a provision that stated any grandchild can live in one of the units at one-quarter current market rent while they're in college. There are two grandchildren graduating high school this year. If I acquire this property, do I need to honor that provision?