CZ meaning in Regional ?

Answer:

What is Canal Zone mean?

The Panama Canal Zone (Spanish: Zona del Canal de Panamá) was a 553-square-mile (1,430 km2) territory inside of Panama, consisting of the Panama Canal and an area generally extending 5 miles (8.0 km) on each side of the centerline, but excluding Panama City and Colón, which would have otherwise fallen in part within the limits of the Canal Zone. Its border spanned two of Panama's provinces and was created on November 18, 1903, with the signing of the Hay–Bunau-Varilla Treaty. When artificial lakes were created to assure a steady supply of water for the locks, those lakes were included within the zone.

Although it was a United States territory, the zone did not have formal boundary restrictions on Panamanians transiting to either half of their country, or for any other visitors. A Panama Canal fence did exist along the main highway, although it was only a safety measure to separate pedestrians from traffic, and some of the U.S. territory was beyond it. In Panama City, if there were no protests interfering with movement, one could enter the Zone simply by crossing a street.

In 1904, the Isthmian Canal Convention was proclaimed. In it, the Republic of Panama granted to the United States in perpetuity the use, occupation, and control of a zone of land and land under water for the construction, maintenance, operation, sanitation, and protection of the canal. From 1903 to 1979, the territory was controlled by the United States, which had purchased the land from the private and public owners, built the canal and financed its construction. The Canal Zone was abolished in 1979, as a term of the Torrijos–Carter Treaties two years earlier; the canal itself was later under joint U.S.–Panamanian control until it was fully turned over to Panama in 1999.

reference

Full Form	Category
Convection Zone	Academic & Science
Cenozoic	Academic & Science
Cane-Zebiak	Academic & Science
Campus Zone	Academic & Science
Celanese, A. G.	Business
Cubic Zirconia	Earth Science
Czochralski Process	Electronics
Lighter-than-air Aircraft Carrier (Cruiser, Zeppelin)	General
Ceska Zbrojowka	General
Creatively Zealous	General
Contiguous Zone	General
Cubic Zarconea	General
Cubic Zirconium	General
Common Zone	General
Crvena Zastava	General
Charles Zean	General
Chang Zheng	General
Ceska Zbrojovka	General
Ceskoslovenska Zbrojovka	General
Castle Znain	General
Current Zero	General
[Panama] Canal Zone	Governmental
Condition Zero	Governmental
Catanzaro (Provence)	International
Club Zoologico (Universiti Putra Malaysia veterinary students)	Medical
Combat Zone	Military and Defence
Code Zebra	Military and Defence
Coahuila and Zacatecas Railway	Regional
Canal Zone	Regional
Coastal Zone	Space Science