CAO 20.7.1b section 9
For paragraph 5.1 (b), the approach climb requirements are met if, in the
approach configuration with the critical engine inoperative at a speed not more
than 1.5 VS, an aeroplane has a
gross gradient of climb of at least:
(a) for a twin-engined aeroplane — 2.1%
What is the NET?
and also..
(b) a weight that will permit compliance with the take-off climb requirements
mentioned in subsection 7 taking into account either ambient temperature
and aerodrome elevation, or approved declared conditions;
and also...
(b) the height necessary to achieve obstacle clearance in accordance with
paragraphs 12.1 and 12.2.
and also...
For the purposes of subparagraph 4.1 (ba), the take-off obstacle clearance
requirements are met if the net flight path of the aeroplane, following failure of the critical engine so that it is recognised at V1 appropriate to a dry runway, would clear by at least
35 feet vertically all obstacles in the take-off area.