The actual text of the Constitution is the final and absolute yardstick all laws are measured against. When the Supreme Court considers the constitutionality of any law it must measure the law against the original text of the constitution and its plain meaning when it was written.
Notice of working hours/changes. Your employer must give you reasonable notice of any changes to your working hours, such as cancelling your shifts. They may request last minute changes (such as ringing you that morning to say that they do not require you to work) and you can choose to agree to this change.
Work time is defined as time scheduled for employees to be on work duty and time spent on authorized paid leaves of absence such as vacation leave, sick leave, comp time off, paid military leave, etc. Exempt: Employees primarily performing work that is not subject to overtime provisions of the Fair Labor Standards Act.