For FAA land, the FAA document explaining the differences. Basically the mandated RSA is being put into place, either in reality or by moving the invisible lines..
https://www.faa.gov/airports/airport...a/cert0905.pdf
In some cases, an airport operator may use declared distances to satisfy the requirement for a runway safety area off a particular runway end. This in effect would shorten the runway length available to be used for ASDA and LDA. (
TORA and TODA are never reduced in this situation.)
(emphasis added) In other cases, an airport operator may use declared distances different than the paved runway length to satisfy runway protection zone (RPZ) or runway object free area (ROFA) requirements, or to reflect a displaced threshold, clearway, or stopway. See the definitions in AC 150/5300-13 Appendix 14, except note that declared distances are to be listed for all runways at certificated airports, not limited to those cases where it is impracticable to provide the required RSA, ROFA, or RPZ as stated in the AC. Additionally, the contents of CERTALERT 00-03 (Stopway), as amended in accordance with this CERTALERT, is attached as a reminder of the criteria to use for designating a stopway.
Pilots and airplane operators’ performance engineers need this information for calculating their allowable takeoff and landing weights and speeds. Therefore, this information needs to be readily available.
The TODA does not take into account obstacles (other than those considered in meeting the RPZ, ROFA, and clearway requirements) that may be off the departure end of the runway. Therefore, the pilot is responsible for determining if the aircraft can clear those obstacles according to the applicable airplane operating regulations and airplane performance data.