My husband's aunt is giving us a crib that she used for her daughter. The crib is 6 years old. One of my friends told me that I couldn't use this crib because they change safety regulations on all cribs every two years. I looked up some safety regulations online and plan on inspected this crib to make sure it meets those safety regulations. Also, when I looked up the regulations it said the last changes made to cribs was in 1999, which was before this crib was bought. Is my friend correct in saying that every two years safety regulations are changed which would make this crib unsafe? Or do you think I will be okay as long as I carefully check this crib and make sure it does fit with the safety regulations that I found online?