Answer

Under New York's partnership law, a partnership can be dissolved simply by having any one of the partners announce his withdrawal from the partnership. If the partners can agree on the distribution of the assets, that's fine, but if they can't -- and they usually can't -- then they need to bring an action in court for an accounting. The court will decide, after a complete review of the partnership books and records, who gets what.

To answer your question, if one partner wants to leave, the others can't prevent it. The partnership agreement of the LLP should set forth the distribution of assets. No oversight is necessary if the partners can agree. They can also agree to buy out the partner who leaves and continue the partnership, if the partnership agreement permits it.