If you have not yet checked out the FAA's UAS web site (AFS-80) it is public information on PL 112-95, Section 333 Exemptions granted to UAS operators. Notice that they do not exempt UAS operators from compliance with 14 CFR Part 91, Section 91.119(a) Minimum Safe Altitude Rules... These quad and hex copters could easily become uncontrolled falling objects and have the potential to hurt or kill someone...