Time extension request for 18723A of 2101 Morning Bright LLC, pursuant to 11 DCMR § 3130.6, for variances from the lot occupancy (§ 772) rear yard (§ 774) and off-street parking location (§ 2116.12) requirements, and a special exception from the rooftop structure requirements under § 770.6(b), to allow the construction of a mixed-use residential building with ground floor retail in the Arts/C-2-B District at 2105 10th Street, N.W. (Square 358, Lots 5, 6 and 802).