"for the L-rd your G-d": This refers to monies, assessments, devotions, and consecrations, (in respect to all of which it is written "to the L-rd.")
"to pay it": it and not its substitute (i.e., if the original were lost, he does not transgress "You shall not delay" with its substitute until three festivals have passed for the substitute.)
"for require shall He require it": These are sin-offerings, guilt-offerings, burnt-offerings, and peace-offerings.
"the L-rd your G-d": These are charities, tithes, first-born (bechor), and the Pesach offering.