I heard they are illegal…
Seriously though, You haven’t told us what state you are in and that is going to have a bearing on the specifics, however, you have mentioned that you are a minor so that helps a little. So I will give you a general walk through.
If you attempt to enter the premises and it is determined that you have a controlled substance on your person you will be immediately detained by police officers conducting the surveillance. For the benefit of the conversation let’s say you are carrying Ecstasy and I feel this is what you are telling us.
Once you have been detected and detained the officers will notify you that they suspect you are carrying a controlled substance. They will then ask you if you have any illegal narcotics or controlled substances on your person and ask you to volunteer to hand that substance over. If you decline, they will then proceed to conduct a search of your person and your belongings. Any Ecstasy tablets either voluntarily handed over or discovered on your person will be taken from you to be later held as evidence.
The police officers involved may also chose to exercise their right to detain you on suspicion of holding a controlled substance and engaging in the commercial supply of controlled substances. Given there are sufficient facilities on site to conduct a detailed search of your person and belongings, you will be taken to those facilities. If not you will be taken to the nearest police station to undergo this search. This search may also involve officers going through your mobile phone.
Upon completion of the search it will be determined whether or not you have any further controlled substances and/or whether you have sufficient amount of a controlled substance to consider that you have a trafficable quantity. At this time the police officers will complete a police report outlining the result of your detention and search. You will then be charged. In NSW you would be charged under Section 8 of the Drug Misuse and Trafficking Act 1985. You will be charged with possession of a controlled substance and if you are holding in excess of 0.5g of MDMA you may be charged with holding a trafficable quantity. In practice though, the trafficking angle is rarely pursued when they are dealing with small numbers, but you never know.
Typically you will be issued with a Criminal Infringement Notice (CIN), however, depending on the state or territory you are in this may not happen as they cannot be issued to minors in certain states. What you will be definitely issued with is a summons/Field Court Attendance Notice. This notice will explain that on a yet to be set date in the not too distant future you will need to appear in court. Once again, you are under 18 and will need to appear at a Children’s Court.
You will appear in front of a Magistrate along with the police prosecutor and the arresting officers. The prosecutor will outline the offence, the police officers will give a summary of events and you will have the opportunity to make a submission to the magistrate.
After this has occurred the magistrate will consider the presentations of the prosecutor, officers and yourself. In addition your police record will be taken into consideration plus the future impact of the sentence and a range of other factors before delivering you your fate.
Enjoy the rave!
