Final answer:
The National Industrial Recovery Act provided that the codes of fair competition for each industry could limit child labor.
Step-by-step explanation:
The National Industrial Recovery Act (NIRA) provided that the codes of fair competition for each industry could limit child labor. These codes were established by the National Recovery Administration (NRA), which aimed to create trade unions representing various industries that would regulate wages, prices, and production to eliminate overproduction and ensure fair working conditions.