what is the meaning BIMCO time charter- parties in maritime law and international law

BIMCO (the Baltic and International Maritime Council) publishes a number of standard time charter- parties covering a wide variety of situations. These are listed here:
• The Baltic and International Maritime Conference Uniform Time- Charter (Box Layout 1974). Code name Baltime 1939.
• The Baltic and International Maritime Conference Deep Sea Time Charter (Box Layout 1974). Code name Linertime.
• Uniform Time Charter Party for Offshore Service Vessels. Code name Supplytime 89.
• Uniform Time Charter Party for Container Vessels. Code name Boxtime.
• The Baltic and International Maritime Conference Uniform Time Charter Party for Vessels Carrying Liquified Gas. Code name Gastime.
• International Association of Independent Tanker Owners Tanker Time Charter Party, issued by INTERTANKO. Code name Intertanktime 80.
• The Baltic and International Maritime Conference Uniform Time Charter Party for Vessels Carrying Chemicals in Bulk. Code name Bimchemtime.
• New York Produce Exchange Form Time Charter, issued by the Association of Ship Brokers and Agents (USA), Inc. Code name NYPE 93.