Hyde,
I am a former SACO. Unless your command suspects you of using AS, all tests you take will be for rec drugs only.
If they do suspect you of taking AS, they will ask you to take a test that will specifically look for AS. If they do ask you, DO NOT CONSENT. If you do consent, they do not need to satisfy probable cause because you did it for them. They will probably then make it a command directed screening. If and when this happens, you dont have a choice anymore, you must provide a sample. The benefit to you by making them force the command directed screening is they cannot use the results in a Court Martial since they did not satisfy probable cause. If you do consent, results obtained are admissable and may be used in a Court Martial.
Hope this helps.