1. Heat a large nonstick skillet over medium-high heat. Place flour in a shallow dish. Sprinkle pork with 1/2 teaspoon salt; dredge pork in flour. Add 2 teaspoons oil to pan; swirl to coat. Add 6 pork slices to pan; cook 2 minutes on each side or until browned and done. Place cooked pork on a platter; keep warm. Repeat procedure with remaining 2 teaspoons oil and remaining 6 pork slices.
2. Add orange juice, 1/3 cup water, marmalade, and vinegar to pan, scraping pan to loosen browned bits. Bring to a boil; cook 3 minutes or until liquid is reduced to 1/2 cup. Stir in remaining 1/4 teaspoon salt and pepper.
3. Place parsley, orange rind, and garlic in a small bowl; stir with a fork to combine. Spoon orange juice mixture over pork; sprinkle evenly with orange rind mixture.