Final answer:
In Texas, the Texas Board of Professional Landmen is the body responsible for issuing certifications for landmen, although specific licensing might not always be required. Regulatory aspects related to the work of landmen are overseen by the Railroad Commission of Texas and the General Land Office.
Step-by-step explanation:
In Texas, the organization responsible for issuing licenses to become a landman is the Texas Board of Professional Landmen (TBPL). The TBPL functions as the certifying body for professionals in the field, though specific licensing might not be required for all landman activities. It's worth noting that while licensing for landmen isn’t specifically managed by the agency, the Railroad Commission of Texas is a significant regulatory body since it has jurisdiction over the oil and gas industry, where landmen frequently operate. Additionally, the commissioner of the General Land Office plays a key role in overseeing exploration activities for oil, gas, and other minerals on state lands, which impacts the working environment for landmen.