The bill imposes novel limitations on what regulations municipalities are allowed to enact/enforce. You won't find the impact of the bill in its text -- to find that, you'd need to read the municipal regulations that would be superceded. Mandatory water breaks (a paltry 10 minutes each 4 hours) are but one example.
"Rest or coffee breaks, defined as 20 minutes or less, are compensable hours worked under 29 C.F.R. 785.18, since they are regarded as being for the benefit of both the employer and the employee."