The first time I wrote this was for the 2014 Polish Championship Team Round. It was a simpler variant of the more common Pentomino Areas. Originally I was going to use LITS for this type, but I liked that better in the second group. This was the second type I thought of. This puzzle is the harder of the two puzzles. Neither is overly difficult. If you see the opening of the puzzle it should cause no problems.
Place the given set of tetrominos in the grid so that they don't touch each other, not even diagonally. Tetrominos may be rotated and reflected. Each black-bordered region must contain a single tetromino.