I’m sorry but surely a contract works both ways?You can agree on date,start time,finish time,test times,FEE etc. However the other party is also entitled to put forward their demands regarding the above and also Uniform. A discussion should be had and you agree on a mutual arrangement. If no agreement is forthwith you simply don’t work for the said company. You cannot simply ignore the uniform aspect because you don’t like it. How would you like it if the other party didn’t agree to some of your demands?