re·ap·por·tion /ˌrē-ə-'pōr-shən/ vt: to apportion anew; esp: to apportion (seats in a house of representatives) in accordance with new population distribution
vi: to make a new apportionment
re·ap·por·tion·ment n
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.