1.)who are you targeting?
2.) what statutes may be relevant and what evidence do you need to satisfy the elements of proof in those statutes?
3.)what is your predication and/or how will you develop evidence that your target is predisposed to commit the particular crime?
4.)specifically, what is you plan?  
5.)what role will the uca play?  
6.) what will the uca do?  
7.)how do you want the uca to dress?   8.)what can the uca say/not say?
9.)how far should/must the uca go in their role, especially if the prostitutes are being targeted?  
10.)how will you ensure the uca's safety?
11.)  how will you minimize the kind of  government action that might constitute entrapment?