ないことはない/ないこともない => can do; is not impossible to ~ N3
ないことには~ない => unless you ~ N2
ないことはない => is not impossible to ~. N2
ことはない => Not necessary N3
Needs, Requirement
と言われている => it is said that ~ N3
Heard
と[言「い」]うのは => Means, is N3
Information, Report
と[言「い」]わせれば => On the view of N1
Based/focused/depending on
どころではない => Its not A N2
Contrast,Surprise
どころのさわぎではない => This is not the time to do things... N2
Base, base
~にかぎったことではない => not limited to only ~ N1
Correction
ことはならない => forbidden, not allowed to do anything N2
Ban
~といっても言い過ぎではない => it is no exaggeration to say; it is not too much to say N1
Position, perspective