The short answer to whether your employer can require you to stay on work on the premises during your break or rest period is that, “yes,” your employer can require that you stay on the premises during your rest break.
Since you are being compensated for the time during your rest period, your employer can require that you remain on its premises.
And under most situations, the employer is required to provide suitable resting facilities that have to be available for employees during working hours in an area separate from the bathroom facilities.
David Payab, Esq. from The Law Offices of Payab & Associates can be reached @ (818) 918-5522 or by visiting http://payablaw.com/