The World of Avlis

I was wondering, how long do the assassin spell-like abilities last (and i suppose blackguard and simmilar too)? Is it a predetermined duration or does the class level determine the duration, like a wizards caster level would? I.e. if a spell (spell-like ability) lasted 1 round/level, it would last 3 rounds on a level three assassin and 7 rounds on a level 7 assassin? Or is it like always 5 rounds or something like that?

Assassin level is considered the caster level for purposes of determining duration of the spells and also for dispelling checks.

Oh cool! Thanks man!