2. Claims of attorneys and counselors-at-law for legal services in connection with any claim arising under this chapter, and claims for services or treatment rendered or supplies furnished pursuant to subdivision (b) of section thirteen of this article, shall not be enforceable unless approved by the board. The board shall approve such application in an amount commensurate with the services rendered and the amount of compensation awarded, having due regard for the financial state of the claimant in accordance with each applicable provision of the following schedule:

1. (a) When an award is made directing the continuation of weekly compensation benefits for temporary total or partial disability, the attorney's fee shall be one-third of one week's compensation.
2. (b) When an award is made that increases the amount of compensation awarded or paid for a previous period or periods of temporary total or partial disability, the attorney's fee shall be fifteen percent of the increased compensation.
3. (c) When an award is made for schedule loss of use or permanent facial disfigurement pursuant to paragraphs a through t of subdivision three of section fifteen of this article, the attorney's fee shall be fifteen percent of the compensation due in excess of the employer or carrier's previous payments.
4. (d) When an award is made for permanent total disability pursuant to subdivision one of section fifteen of this article or permanent partial disability pursuant to paragraph w of subdivision three of section fifteen of this article, the attorney's fee shall be equivalent to fifteen percent of the compensation due in excess of the employer or carrier's previous payments, plus a sum equivalent to fifteen weeks of compensation at the rate fixed by the board.
5. (e) When an award is made for death benefits pursuant to section sixteen of this article, the attorney's fee shall be equivalent to fifteen percent of the compensation due in excess of the employer or carrier's previous payments, plus a sum equivalent to fifteen weeks of compensation at the rate fixed by the board.
6. (f) When an award is made pursuant to section thirty-two of this article, the attorney's fee shall be fifteen percent of any benefits to be paid by the employer or carrier under the agreement. However, if the attorney has previously been awarded a fee pursuant to this subdivision, any un-accrued balance of any attorney fees under the foregoing paragraphs shall be waived.