Start by making the simple syrup, if you don't have any on hand. Mix 7 ounces sugar with 7 ounces water. Microwave until the sugar has dissolved. You should have about 9-10 ounces so there will be a little extra for rimming the glasses.
In a large pitcher, combine all the margarita ingredients. Stir well and chill.
When ready to serve, pour the remaining simple syrup in a shallow dish. Pour sea salt (or flake salt) in a second shallow dish. Then dip the glass rims in simple syrup, followed by salt.
Add ice to the glasses if desired, and fill a shaker with ice. Add the margarita mix to the shaker and shake for 10-15 seconds. Pour into glasses. Garnish the glasses with sliced limes or oranges and serve. Ole'!
For single servings made in a shaker combine: 2 ounces Tequila, 2 ounces lime juice, 1 ounce La Belle, 3/4 ounce simple syrup, 1/3 ounce orange juice, 1/3 ounce Triple Sec.