Subchapter II. Officers and Employees 13 U.S. Code §21. Director of the Census; duties 13 U.S. Code §22. Qualifications of permanent personnel 13 U.S. Code §23. Additional officers and employees 13 U.S. Code §24. Special employment provisions 13 U.S. Code §25. Duties of supervisors, enumerators, and other employees 13 U.S. Code §26. Transportation by contract