So if i buy the new halo map packs will they only work for my gamer tag?

i am willing to buy the new map packs but my friends don't want to. so i need to know if it's exclusive to the gamer tag that purchased it or can everyone playing on my console play the maps if i buy them?So if i buy the new halo map packs will they only work for my gamer tag?only your gamertag as each gamertag needs seperate memberships coz i have 3 accounts and 1 is online if i want others i need to pay for 3 memberships so its only on yr gamertag. if they are on yr console logged in as you yes, if they log in with their accounts noSo if i buy the new halo map packs will they only work for my gamer tag?every profile on your xbox can play them but i recommend that you buy halo 3: ODST since it will come with the halo 3 multiplayer and ALL map packs