Dutch to English Law/Patents Law: Contract(s) annual media agreement

Attached to the annual media agreement I'm working on, one of the appendices has a summary to be filled in concerning the scope of the application of the contract, for lack of a better description. In the middle of this appendix is a table for listing the producer, the division and the article group for items to be ordered for resale. Above that table I encounter the following sentence:

"Niet opgenomen/vermelde producenten en/of afdelingen/artikelgroepen worden *gepufferd* met X%."

This has got to be an anglicism, but I'm stumped. Anyone willing to take a bash here? RSVP. TIA. Cheers, R.