recessio

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
RECESSION. A re-grant: the act of returning the title of a country to a 
government which formerly held it, by one which has it at the time; as the 
recession of Louisiana, which took place by the treaty between France and 
Spain, of October 1, 1800. See 2 White's Coll. 516. 
    

[email protected]