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As with other documents provided as guidance for applying regulatory requirements in the retail sector , these Procedures are in the " public domain " and we encourage their duplication and use . Exceptions to this rule include foreign-language films , which are submitted by their country of origin and need not have been shown in the United States . The accuracy of test strips , which are designed for use with a specific chemical sanitizing compound , is deemed acceptable for field test purposes . The two primary U.S. microchip manufacturers , American Veterinary Identification Devices and Digital Angel Corp ., offer scanners that detect the rice-sized chips , which are encoded with the pet owner 's contact information . More results > 57 Student Encyclopedia Britannica articles , specially written for elementary and high school studentsdrug abuseDrugs are not always beneficial to their users . Look for oil-based capsules , which are far better absorbed and utilized than dry capsules are . An insurance policy providing medical benefits for yourself and your J-2 dependents must remain in effect while you are in the United States . The plays are based on the lives of legendary and historical figures , and through costume and masks the ethnic origin and ethical character of the players are revealed . Second , the static nature of metadata records , which are generally created once by resource creators or catalogers , is also problematic .