Final answer:
An ODP card allows individuals to continue servicing refrigeration systems and indicates that they have been trained in environmental and regulatory norms regarding refrigerants.
Step-by-step explanation:
The question concerns the certification and use of an ODP (Ozone Depleting Substances) card, which is related to refrigeration and air conditioning systems. Upon successful certification or re-certification, the issuing of a valid ODP card permits the individual to continue servicing refrigeration systems. It certifies that the individual has been trained on the environmental aspects of handling refrigerants and is aware of the regulations governing their use. Holding an ODP card does not permit an individual to ignore regulations, refuse service, or restrict them to work only in specific locations.