This is a new thing, and companies are starting to comply. They are starting to put the statements up, led by the biggest companies, which take this issue very seriously. It is starting to focus directors' attention on the issue of slavery in their supply chains. I don't know how else to answer the question.
Evidence of meeting #89 for Subcommittee on International Human Rights in the 42nd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was companies.
A recording is available from Parliament.