1) Concessions 2) Fixed quantities 1) Rations 2) Stipends 
Reductions in weights to be carried allowed because of certain conditions such as; an apprentice jockey is on a horse, a female horse racing against males, or three-year-olds racing against older horses.
Tax allowances are concessions by the Inland Revenue which can be used to reduce a person's... <a target=_blank href='http://www.finance-glossary.com/terms/allowances.htm?id=12267&ginPtrCode=00000&PopupMode=false' title='Read full definition of allowances'>more</a>