The City will: before July 1, 1897, plant with grass, trees, and shrubs, improve, and thereafter maintain the squares now laid out in the center of Park Avenue; and at all times thereafter, prevent their being overgrown with weeds or becoming unsightly. City Code, 1927, art. 29, §8 1950, art. 30, §7 1966, art. 21, §9 1976/83, art. 21, §8 Ord. 1897-056