Many insurers use standard insurance forms and endorsements issued by the Insurance Services Office, or ISO, which is subsidiary of a company called Verisk Analytics. ISO recently made several changes to its forms and endorsements. The law firm of Saxe Doernberger & Pita has described the changes here.
As summarized in the Saxe blog post, the changes expand who is an additional insured, especially in the context of construction defect and liquor liability claims. They also affect waiver of subrogation clauses.