allowable[adjective]Synonyms: permissible, acceptable, admissible, all right, appropriate, suitable, tolerable 
 [TahlilGaran] English Synonym Dictionary ▲
 al‧low‧a‧ble /əˈlaʊəb
əl/ 
 adjective1.  acceptable according to the rules
 Synonym : permissible: 
 The maximum allowable dosage is two tablets a day.2.
 The maximum allowable dosage is two tablets a day.2.  allowable costs are costs that you do not pay tax on: 
 allowable deductions such as alimony and business expenses
 allowable deductions such as alimony and business expenses  [TahlilGaran] Dictionary of Contemporary English ▲