Whether its a helicopter or private jet or commercial plane.
Some states say the rest of the money for the purchase has to be made the day after the deposit is made but don't know about the payout to the finder, broker or dealer
This depends on the contract made. Usually, you pay the finder when the contract is executed, concluded (title passes) but it may vary. It would be wise to have a transactional attorney review the contract prior to the purchase and also make certain that all warranties and rights are included.
There is no law dictating when it be paid. It is a matter of freedom of contract and the contract as signed (not the contract for sale, the contract to pay a commission, must be reviewed.
The above is general legal and business analysis. It is not "legal advice" but analysis, and different lawyers may analyse this matter differently, especially if there are additional facts not reflected in the question. I am not your attorney until retained by a written retainer agreement signed by both of us. I am only licensed in California. See also avvo.com terms and conditions item 9, incorporated as if it was reprinted here.
THere should have been escrow instructions or at least a provision regarding the commission. If there is not then you will need to have an attorney review the situation for you to properly advise you.
As stated by counsel Condor and the other good counsel, in California there is no law specific to this industry or otherwise that would require commission or purchase money to be paid in a particular sequence and it likely falls to the terms of the agreement(s) between the seller and buyer and (if separate) between the seller and the party that has accrued a right to commission. There are, however, sections of the Labor Code that require the written documentation of commission compensation for employees - so, it would be important to know whether the person with a commission right was an employee of the seller or (purportedly) an independent contractor.
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