Google posted a help document that discloses the upcoming changes to the Google Shopping Policy Center including changes to their shopping policies. The changes documented here include:

Fewer and simpler Shopping policies
More transparency into why we have each policy
More insight into how a policy can affect your ads
Aligned across our advertising products

You can preview the new policy center and content within it over here.

“Google requires that merchants comply with all applicable laws and regulations, as well as Shopping policies, at all times,” they say.

Forum discussion at Google Advertiser Help.