As used in this part:

“Hilo community economic district” means the area beginning at the intersection of Manono Street and Kamehameha Avenue, extending south to Piilani Street, east from Piilani Street to Kalanikoa Street to include Hoolulu Park, and west from the intersection of Manono Street and Piilani Street to tax map key 3-2-2-031-001, inclusive along the coastline to Maile Street until its intersection with Kilauea Avenue and then to Aupuni Street and beyond to include the following tax map keys until intersection with Ponahawai Street: 3-2-2-013-003, 3-2-2-012-001, 3-2-2-012-016, 3-2-2-011-01, and 3-2-2-007-018; extending makai to tax map key 3-2-3-002-016, along the coastline and including tax map key 3-2-2-001-006 until intersection with Lihiwai Street; those lands bounded or abutting Lihiwai Street, inclusive through Banyan Drive until its intersection with Kamehameha Avenue; from Kamehameha Avenue at its intersection with Kalanianaole Avenue and extending east on Kalanianaole Avenue to include those abutting lands until tax map key 3-2-1-010-033 on the mauka side of the road and tax map key 3-2-1-01-1010 on the makai side of Kalanianaole Avenue, to include also any of those lands on Ocean View Drive makai of Kalanianaole Avenue and the lands mauka on Silva Street and Keaa Street; the lands within the Hilo airport area managed by the department of land and natural resources as identified on tax map key 3-2-1-12; and the lands abutting or bounded by Kanoelehua Avenue extending south to Makaala Street, then east on Makaala Street to Railroad Avenue then north on Railroad Avenue until Leilani Street and east on Leilani Street until tax map key 3-2-2-037-144, then west on Leilani Street until its intersection with Kanoelehua Avenue; and all those lands abutting or bounded by Pohaku Street, Kukila Street, Halekauila Street, and Lanikaula Street as identified on tax map key 3-2-2-58; on Kanoelehua Avenue heading north from Makaala Street those lands mauka including those lands on Makaala Street, Holumua Street, Pookela Street, Wiwoole Street, and Kawili Street as identified on tax map key 3-2-2-049 and 3-2-2-050; then on Kanoelehua Avenue North from Kawili Street and Kalanikoa Street from Piilani Street until they intersect with Kamehameha Avenue.

“Substantial improvements” means any renovation, rehabilitation, reconstruction, or construction of the existing improvements, including minimum requirements for off-site and on-site improvements, the cost of which equals or exceeds thirty per cent of the market value of the existing improvements that the lessee or the lessee and developer install, construct, and complete by the date of completion of the total development.