In the most complete revision of its nursing home rules in at least 25 years, the Pennsylvania Department of Health last month proposed new regulations that would require more scrutiny of homes’ prospective owners. For the first time, regulators would analyze the financial strength and past performance of owners — including individuals, not just legal entities — and related companies that seek to take over nursing homes in the state. Historically, officials have effectively rubber-stamped license applications, critics said. The new regulations are part of the first full revision of the rules f…