Is your contract fully ratified? If the contract is not fully ratified, then chances are they can do it, but your agent would have to put you in touch with an attorney to help you interpret the law relating to verbal contracts. If it is fully ratified, then read the contract specifically for language allowing that. Again, an attorney can tell you if the language in the contract is enough, as some things found in contracts are rendered void or unenforceable by state or local code. If the contract is ratified and there's no language in there allowing this action, then my guess (guess) is that you can enforce the contract. No matter which applies, you'll need an attorney on this one.