spells out special conflict of interest rules for lawyers who are current or former

government employees. The movement of lawyers from public service and practice to private practice and involvement in the same or similar issues and controversies requires rules that expressly spell out when a conflict exists that prevents representation or permits such representation if certain conditions are met, including screening where appropriate. The rule likewise governs the conduct of lawyers moving from private practice into the public sector. DR 9-101(B) includes only a broad prohibition forbidding a lawyer from accepting private employment in a matter in which he or she had substantial responsibility while a public employee. This prohibition is based on avoiding the appearance of impropriety and gives no specific guidance to former government lawyers. Comparison to ABA Model Rules of Professional Conduct