I think your question has been answered here:
https://vexforum.com/t/answered-clarification-of-rcs3/37533/1
"See :
Skills Loads may be loaded at any point during a Skills Match.
Does any point include the fractions of second after the match start? For example, would it be legal if you were to legally load your one preload, holding the remaining 3 stars right above your robot, and drop them as soon as the match began?
Additionally, it is legal for Drive Team Members to break the plane of the field perimeter when they deploy Driver Control Loads?
Answered by Karthik See post in context
@MayorMonty Does any point include the fractions of second after the match start? For example, would it be legal if you were to legally load your one preload, holding the remaining 3 stars right above your robot, and drop them as soon as the match began?
Yes, this is both a legal and common strategy.
@MayorMonty Additionally, it is legal for Drive Team Members to break the plane of the field perimeter when they deploy Driver Control Loads?
Yes, this is allowed as per <G7a>, which is quoted below. (Some text bolded for emphasis.)
VEX Robotics Competition Starstruck Game Manual a. Drive Team Members are not permitted to break the plane of field perimeter at any time during the match, with the exception of the actions described in <SG3> and <SG4>."
