12) خبر ما و لا المشبهتين بليس

It is the musnad after their entrance, such as ما زيدٌ قائمًا و لا رجلٌ حاضرًا .

And if the khabar occurs after illaa, such as ما زيدٌ الا قائمٌ , or the khabar precedes the ism, such as ما قائمٌ زيدٌ ,  or if in is added after maa, such as ما ان زيدٌ قائمٌ , the ‘amal of maa is nullified, as you saw in the mentioned examples.  And this is according to the ahlul Hijaaz.  As for the banu tameem, they do not make ‘amal on them.