use of a broker

No.

You are under no obligation, but the Sales Office may "protect" your broker as a mattter of policy if you are linked to the broker in their database. Call it honor among thieves.

It depends on whether you're trying to go brokerless, or you're trying to switch brokers. if you're trying to switch, enough time has probably passed and all you probably need to do is write a letter saying that broker Y now represents you.

If you're trying to go brokerless (which I wouldn't recommend with a new development, because I think they usually pocket the money that they have budgeted for sales commissions rather than giving it back to the buyer), take a look at the original agreement that you signed when you walked in and see what timeframe is attached to it.

ali r.
{downtown broker}

Ali--aren't those exclusive agreements generally 6-9 months? I'd think 10 months would be outside any previous agreement...