Section 1. Be it enacted by the Senate and House of Representatives of the Commonwealth of Pennsylvania, in General Assembly met, and it is hereby enacted by the authority of the same, That it shall be the duty of the wardens for the port of Philadelphia, on the application of any person for a license to act as a pilot in the bay or river Delaware, to take to their assistance in the examination of such pilot, two pilots having licenses of the first class; and the person so applying shall pay to the pilots who may assist at such examination, the sum of one dollar each: Provided, That from and after the passing of this act, no license to act as a pilot, shall be granted to any person under the age of twenty-one years, nor unless he has served a regular apprenticeship for the terms and in the manner prescribed in the eighteenth section of the act to which this is a supplement: And provided also, That this act is not to be construed to deprive persons under the age of twenty-one years, who now have licenses, from enjoying the benefit of the same.