#0 - Nov. 18, 2010, 4:35 a.m.
Q u o t e:
Are there any limits on when and where I can summon my friend?
You may summon a recruit character once every hour; recruit characters may also summon you on a one-hour cooldown. Although the ability to be summoned ceases at level 61, characters of this level or above may still summon their friends as long as the summoning target is level 60 or lower.
Note: Characters on accounts which are not BC- or WotLK-enabled may not be summoned to BC- or WotLK-specific zones. These include Blood Elf, Draenei, and Death Knight starting areas, as well as the whole of Outland and Northrend.