The first edition of the Essential Medicines List for Children (EMLc) was published in 2007. This list was developed by the World Health Organization (WHO) to address the specific medicinal needs of children, recognizing that children's pharmacological requirements differ significantly from those of adults. The EMLc serves as a guide for countries to prioritize the procurement and supply of essential medicines that are both effective and safe for pediatric use.

Key points to note:
- The EMLc was introduced to improve access to essential medicines for children worldwide.
- It highlights the importance of age-appropriate formulations and dosages.
- The list complements the WHO's main Essential Medicines List by focusing specifically on pediatric therapeutic needs.
- Since its first edition in 2007, the EMLc has been regularly updated to reflect new evidence and changing health priorities for children.

Thus, the correct answer to the question is 2007.

Reference: WHO Model Lists of Essential Medicines for Children, World Health Organization, 2007 Edition