1. Establishment of a diplomatic envoy between the kingdoms 2. Setting boundaries and respecting territorial sovereignty 3. Exchange of royal hostages to ensure non-aggression 4. Agreement on tariffs and trade taxes 5. Setting up regular market days for cross-border trade 6. Rules regarding the treatment of merchants and traders in each kingdom 7. Mutual cooperation in apprehending criminals and bandits 8. Agreement on extradition of criminals found within each other's borders 9. Management and maintenance of shared roadways and infrastructure 10. Shared defense against external threats or enemies 11. Regulation of fishing rights in shared water bodies 12. Navigation rights on shared rivers and waterways 13. Agreement on a common currency or exchange rates 14. Marriage alliances between royal families or nobility 15. Shared building projects, such as fortifications or bridges 16. Allowing religious freedom for citizens of the neighboring kingdom 17. Coordination of policies and responses to disease and public health crises 18. Protection of pilgrims and travelers from the other kingdom 19. Guidelines for resolving disputes between citizens of each kingdom 20. Education and cultural exchanges to promote understanding and collaboration 21. Monitoring and enforcement of the agreed-upon terms 22. Regular meetings between representatives to discuss further cooperation 23. Establishment of a council to mediate disagreements between the kingdoms 24. Joint military exercises and training 25. Cooperation in technological advances and innovations 26. Preservation of natural resources and the environment 27. Requiring cooperation from local lords and nobility to maintain the agreement 28. Maintaining a neutral stance on internal conflicts within the neighboring kingdom 29. Supporting the other kingdom in disputes with external adversaries 30. Rules regarding hunting and land usage in the border regions 31. Establishment of a joint fund to develop shared infrastructure and initiatives 32. Coordination on agricultural policies and practices 33. Cooperation in taxing and combatting smuggling and black market activity 34. Joint initiatives on disaster relief and emergency response 35. Shared research and development of medicine and healthcare advancements 36. Commemoration of joint historical events and legends 37. Cooperation in the production and distribution of arts and literature 38. Coordination of policies on slavery and indentured servitude 39. Protections and rights for migrating workers and craftsmen 40. Agreements on military conscription and desertion across the border 41. Cooperation on dealing with neighboring tribes or feudal groups on the fringes of the agreement 42. Establishment of safe havens for both kingdoms' civilians in times of conflict 43. Agreement on diplomatic protocols and ceremonies 44. Cooperation in the production of maps and geographical exploration 45. Recognition of titles, landholdings, and the legal systems of the neighboring kingdom 46. Agreements on armorial bearings and heraldry 47. Shared standards for weights, measurements, and coinage 48. Collaboration on archaeological and historical research 49. Ensuring that embassies and diplomatic quarters are respected and protected 50. Agreement on a method for amending or terminating the agreement in the future

1. The monarchs of both kingdoms: Kings, Queens, or regents representing the royal families. 2. Royal spouses or consorts: Those married to the ruling monarchs who may have influence or political experience. 3. Crown Princes and Princesses: Heirs to the throne of each kingdom, who are being trained in diplomacy and statecraft. 4. Ambassadors and diplomats: Professionals adept in negotiation and well-versed in the customs and traditions of both kingdoms. 5. High-ranking members of nobility: Dukes, Duchesses, Earls, and Counts who have a vested interest in the outcome of the negotiations. 6. Royal advisors and counselors: Trusted individuals who provide input on matters of diplomacy and strategy. 7. Emissaries and envoys: Representatives sent by their respective kingdoms to gather information and relay messages. 8. Scholars and scribes: Educated individuals responsible for documenting the negotiations and maintaining the historical record. 9. Religious leaders: Bishops, abbots, or other religious figures who hold significant influence in either kingdom or the regional church hierarchy. 10. Military commanders: Knights, generals, or commanders who bring their tactical experience and perspective on potential threats or alliances. 11. Spymasters or intelligence officials: These individuals protect their kingdom's secrets and gather information on the opposing kingdom for strategic advantage. 12. Trade representatives or guild masters: Experts in commerce who can advise on the economic aspects of the agreement. 13. Key landowners: Influential and wealthy individuals who directly control resources near the border regions. 14. Representatives of smaller neighboring territories: Lords or officials from smaller regions that may be affected by the negotiations and potential alliances. 15. Expert negotiators or mediators: Neutral parties skilled in facilitating diplomatic discussions and resolving disputes. 16. Heralds and messengers: Individuals responsible for announcing and delivering official messages between the negotiating parties. 17. Court entertainers or musicians: Those chosen to provide entertainment and cultural appreciation during the negotiation process. 18. Translators or interpreters: Linguistic experts who ensure clear communication between the kingdoms, especially if different languages are spoken. 19. Hosts and hospitality staff: Members of court responsible for accommodations, food, and ensuring the comfort of attendees. 20. Security personnel: Guards and other officials tasked with maintaining the safety and integrity of the negotiation process.