International soccer matches can be played on Turf, as long as FIFA certifies the field, which requires a pre-approved type of turf to be used and subsequent brown bag of cash to be handed over to the nearest FIFA official.
From Wiki
“FIFA designated a star system for artificial turf fields that have undergone a series of tests that examine quality and performance based on a two star system. Recommended 2-Star fields may be used for FIFA Final Round Competitions as well as for UEFA Europa League and Champions League matches. There are currently 130 FIFA Recommended 2-Star installations in the world.
In 2009, FIFA launched the FIFA Preferred Producer Initiative to improve the quality of artificial football turf at each stage of the life cycle (manufacturing, installation and maintenance). Currently, there are five manufacturers that were selected by FIFA including ACT Global Sports, Limonta, Desso, GreenFields and Edel Grass. These firms have made quality guarantees directly to FIFA and have agreed to increased research and development.”
So, putting in artificial turf should not preclude soccer being held at the Rent (I am hoping that either the Rent or Red Bull Arena gets one of the US pre-Cup warm-up games next spring).