http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/rrif-ferr/trns/pmnt-eng.html

RRSP must mature by the last day of the year in which you turn 71. On maturity, the funds must be withdrawn, transferred to a RRIF, or used to purchase an annuity. No tax is withheld on amounts transferred to a RRIF or used to purchase an annuity. However, if funds are withdrawn from your RRSP, tax will be withheld and the amount withdrawn has to be included in your income for the year in which it is withdrawn