Final answer:
A LEED project can display the LEED plaque and other marketing material if it meets the certification requirements set by the USGBC.
Step-by-step explanation:
A LEED project can be eligible to display the LEED plaque and other marketing material when it successfully meets the certification requirements set by the U.S. Green Building Council (USGBC). The LEED certification is awarded to buildings and projects that meet specific sustainability and environmental performance criteria. Once a project has been completed and meets the necessary requirements, it can apply for LEED certification and, if approved, can proudly display the LEED plaque and other marketing material.