Final answer:
In Texas, Joan Jettson must have a real estate license to legally work as a residential rental locator for several apartment complexes in downtown Houston, as mandated by the Texas Real Estate Commission (TREC).
Step-by-step explanation:
In the state of Texas, individuals like Joan Jettson who work as residential rental locators in Houston do require a real estate license. The Texas Real Estate Commission (TREC) requires anyone engaged in real estate brokerage activities, which includes leasing residential property, to hold a valid real estate license.
Since Joan actively works with several apartment complexes in the downtown area to lease or locate rentals, she must be licensed to do so lawfully. Getting a real estate license involves completing educational requirements, passing an exam, and maintaining the license according to state regulations.