The United States Pharmacopeial Convention 857 or USP 857 necessitates that all equipment imported into the USA by pharmaceutical companies in the country should mandatorily satisfy their set of requirements. This mandate was established and brought into play on 1st May 2016 and continues to affect all vendors in this field of operation. The USP 857 standards contain very specific criteria for verification of wavelength accuracy and photometric accuracy of concerned equipments. There are also new requirements suggested for spectral resolutions and stray light which wasn't present previously. Apart from this, they have also laid out very specific requirements for filters for each verification that is conducted. These USP requirements are more in tandem with International Pharmacopeial requirements. All new and existing laboratories in the USA are expected to conform to these new set standards and actively involve in testing these changes which are now recognized officially.