allowable

Appropriate; acceptable.

Intellectually admissible; valid; probable.

Able to be added or deducted in consideration of something.

Permissible; tolerable; legitimate.

And first, although there were more things in nature then words which did expresse them, yet even in these mute and silent discourses, to expresse complexed significations, they took a liberty to compound and piece together creatures of allowable formes unto mixtures inexistent […]

New HISA regulations, implemented last month, include strict rules about withdrawal times and allowable medication levels on race day.

Praiseworthy.

A permitted amount or activity.