(1) for private nursing duty, five per cent of the salary or wages received each week through the first ten weeks of that engagement only, and such fee shall be due and payable at the end of each such week;

(2) for any other nursing duty, the amount of the first week's salary or wages unless the first year's computed salary or wages to be derived for at least one year's employment is twenty-five hundred dollars or more, in which event the gross fee shall not exceed, in percentage of such salary or wages, the following: where such first year's salary or wages is at least $2500 but less than $3000 ............................. 2 1/2 % at least $3000 but less than $3500 ............................. 3 % at least $3500 but less than $4000 ............................. 3 1/2 % at least $4000 but less than $4500 ............................. 4 % at least $4500 but less than $5000 ............................. 4 1/2 % $5000 or more .................................................. 5 % 10. Notwithstanding any other provision of law to the contrary, no fee may be charged or collected for services rendered by an employment agency not licensed pursuant to section one hundred seventy-two of this article at the time such services were rendered. In an action to collect a fee, the court shall void all or any part of an agreement or contract with an employment agency that did not have a valid license at the time the contract was entered into or services were rendered; however, such contract shall not be considered void if a court finds a good faith effort by an employment agency to maintain its license despite clerical error or delay by the department of labor or the New York city department of consumer affairs.