§ 428. Physical examinations. If an employee is a new employee, an
absentee for ten or more successive days, an employee who has worked in
compressed air continuously for three months or a beginner in compressed
air who has worked but a single shift as required by section four
hundred and thirty, the officer or officers required by subdivision one
of section four hundred and twenty-seven shall examine him and declare
him physically fit to work in compressed air before permitting him to
enter or re-enter the working chamber.