The law has already been in existence and is now strictly enforced by the border officials of Peru. Travelers are required to own a passport to be valid at least six months beyond the date of arrival in Peru to be allowed to cross the border. If validity of the passport should be less, there is a high risk of being denied entry.
As the change came into effect at the beginning of 2019, business travelers should keep in mind to renew their passports if they are to expire within six months of the desired travel date to Peru, in order to guarantee a successful entry or re-entry without being turned away by the border officials.