SECTION 1. Subsection (i) of section twelve hundred and three of the Administrative Code is hereby amended to read as follows:
" (i) Every steamer making round trips in not more than forty-eight hours, staying all night in port, shall have the following complement of engineers:
"Up to one hundred and twenty horsepower, one fourth engineer.
"From one hundred and twenty-one horsepower upward, one third and one fourth engineer."