The term used by U.S. Customs and Border Protection (CBP) to describe the process by which it limits the number of people who can request asylum at a port of entry at a Mexico-U.S. border crossing on a daily basis. International law guarantees that anyone who steps foot on U.S. soil can request asylum; therefore, in order to carry out metering, CBP stations guards at border crossings to prevent migrants from stepping onto U.S. soil. The legality of asylum metering is challenged by many immigration lawyers who point out that the right to apply for asylum in the U.S. is guaranteed by U.S. law (U.S. Code, Title 8, Section 1225) and international law (1951 Convention relating to the Status of Refugees).