EUROCODE 2004 multi opening walls

[ramihabchi]

Im eurocode 2004 they permit ignoring openings in walls with area smaller than one tenth the total area of the wall in design and buckling checking.(12.6.5)
My question is:when we have many openings in the wall to be ignored.should each opening area be less than 10% the total area of the wall(without the openings)or should the sum of openings areas be less than 10% the total area of the wall(without the openings)?

 

[HTURKAK]

Copy and paste of the note at Table 12.1: Values of β for different edge conditions ..

Note: The information in Table 12.1 assumes that the wall has no openings with a height exceeding 1/3 of the
wall height lw or with an area exceeding 1/10 of the wall area. In walls laterally restrained along 3 or 4 sides with
openings exceeding these limits, the parts between the openings should be considered as laterally restrained
along 2 sides only and be designed accordingly...

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