Article 19.3.2 says
- Up to 3 Directors appointed by National Council, one of whom may represent Affiliated Clubs, provided that the total number of Directors appointed by National Council, together with the President, shall not at any time exceed one third of the total number of Directors from time to time in office;
Article 19.9 says
- In the event that the number of Directors appointed by National Council, together with the President, exceeds one third of the total number of Directors from time to time, either one of the Directors appointed by National Council shall abstain from voting for such period (as determined by National Council) or steps shall be taken by the Directors to promptly co-opt Director(s) to ensure the relevant ratios required by this Article 19 are maintained.
These rules apply to the number of Directors elected/appointed to the board, NOT the number attending any particular meeting. So for a meeting as long as a quorum is reached the Directors 'origin' is irrelevant.
If a Director left the board suddenly, and without a successor plan, then an NC member would need to abstain from voting until the board was returned to it's full strength.