The LPM strongly encourages researchers to visit and study the skeletal collection on site. If the necessary research equipment is not available in Puerto Rico and cannot be shipped, a loan may be arranged to the institution housing the equipment. Loans are made at the researcher's expense and within the confines of the United States and its territories. Before shipping materials, the LPM requires that researchers sign a document stating that they understand the specimens are on temporary loan, and that they agree to return the specimens in good condition, at their own expense, by a specified date. Until the materials are returned, no other loans will be made.