Does a no cold calling sticker mean expessing a rejection of door-step selling?

In a discussion of law reform concerning door-step selling, there is an argument that posting a no cold calling sticker does not mean expressing rejection of a cold calling.

The METI posted it on his interim report on 10th December 2007 in relation to the law reform. However, the METI’s argument is not consistent with the interpretation over a guidance about revised Commodity Futures Law.

Posting of no cold calling label in commodity futures trading

The law prohibits second solicitation in case a customer rejected solicitation by commodity trader (art. 214-5). The METI seems to consider that the expressing rejection of solicitation includes posting the sticker, therefore traders cannot solicit to consumers who post the sticker in their house.