TopBunk is absolutely right. Though when issuing an order or command those who are empowered to do so must make clear they are issuing an order or command and not a request, somewhat similar to military law where an officer has to be clear he or she is issuing an order rather than a request. As Top bunk also says an order must be lawful, if it is not then it can be refused, deferred, taken under protest, also similar in military law.