(a) (1) In investigating an employer's selection procedures (including those identified below) for adverse impact on the basis of national origin, the Commission will apply the Uniform Guidelines on Employee Selection Procedures (UGESP), 29 CFR part 1607 . Employers and other users of selection procedures should refer to the UGESP for guidance on matters, such as adverse impact, validation and recordkeeping requirements for national origin groups. (2) Because height or weight requirements tend to