The maximum length of a block shall be 450 feet, except that:

(a)        where a block includes a convention center, such length shall be unlimited;

(b)        where a block bounds the intersection of 126th Street and Northern Boulevard, such length shall be limited to 675 feet;

(c)        where a block bounds the intersection of 126th Street and Roosevelt Avenue, such length shall be limited to 575 feet; and

(d)        blocks or portions of blocks east of a line 600 feet east of and parallel to 126th Street and west of a line 1,350 feet east of and parallel to 126th Street shall have a maximum distance between intersections on a connector street of 218 feet, except where a block includes a convention center or the minimum two-acre park required pursuant to Section 124-40 (PUBLICLY ACCESSIBLE OPEN SPACE REQUIREMENTS). Where public pedestrian access between a connector street and another street on the same block is located no less than 218 feet from both intersections on a connector street through provision of open space pursuant to Section 124-40, inclusive, such block or a portion of a block east of a line 600 feet east of and parallel to 126th Street and west of a line 1,350 feet east of and parallel to 126th Street may have a maximum distance between intersections on a connector street that does not exceed 400 feet, provided that there is only one such block in the Special District.