For questions about Organized Play, it's always best for the store to contact their WPN rep.
The MTR - which covers any REL - says “Each player (or team) must be given exactly the same quantity and type of product as all other players participating in the tournament.”
For a true
Chaos Sealed format, players should get balanced sets of boosters, but not necessarily the same as each other player; that's why it's Chaos! (For help with balancing, see that link, which explains the original Chaos Sealed format - my favorite format, by the way!)
d:^D