Final answer:
EML, or Essential Medicines List, is authorized for healthcare practitioners and organizations to guide the procurement and supply of essential medicines, especially in low-and-middle-income countries.
Step-by-step explanation:
EML, which stands for the Essential Medicines List, is authorized for use by healthcare practitioners and institutions responsible for prescribing and supplying medicines. The EML is maintained by the World Health Organization (WHO) and aims to ensure that everyone has access to the most essential medications required for basic healthcare. Healthcare organizations, especially in low-and-middle-income countries, use the list to guide the procurement and supply of medicines to their populations.