From the Consumer Specialty Products Association:

January 1, 2010 marks the effective date for a consumer product ingredient communication initiative that three industry groups developed as a means for companies to share with consumers more information about the ingredients in four consumer product categories—air care products, automotive care products, cleaning products, and polishes and floor maintenance products.

…Companies participating in the initiative will have the options to list product ingredients on the product label; on the manufacturers’, distributors’, or importers’ website; via a toll-free telephone number; or through some other non-electronic means.

For more information on the initiative program follow the above link.