allowable
/əˈlaʊəb(ə)l/
adjective
Allowed, especially within a set of regulations; permissible.
the loan deal has been extended to the maximum allowable three months
permissible,permitted,allowed,admissible,acceptable,legal,lawful,legitimate,licit,within the law,authorized,sanctioned,sanctionable,approved,above board,within accepted bounds,passable,tolerated,tolerable,proper,all right,in order