Queensland Numbered Acts Queensland Numbered Acts(1) A block is the land resulting from a notional division of the earth's surface--
(a) by 2 meridians of longitude 5 minutes apart, each meridian being a multiple of 5 minutes of longitude from the meridian of Greenwich; and
(b) by 2 parallels of latitude 5 minutes apart, each parallel being a multiple of 5 minutes of latitude from the equator.
(2) A sub-block is the land resulting from a notional division of a block into 25 areas, each sub-block being bounded by 2 meridians of longitude 1 minute of longitude apart and 2 parallels of latitude 1 minute of latitude apart.
(3) Each block and sub-block must be identified in the way approved by the chief executive.