when the time a bankruptcy stays on your credit report change from 7 to 10 years

The current law (which is NOT bankruptcy law) allows credit reporting agencies to report a bankruptcy for up to 10 years from the date the case was filed. When the law changed isn't particularly relevant since this is what applies to any case filed prior to (and subsequent to) today. Mark Markus has been practicing exclusively bankruptcy law in California since 1991.  He is a Certified Specialist in Bankruptcy Law by the State Bar of California Board of Legal Specialization,  AV-Rated by martindale.com, and A+ rated by the Better Business Bureau.