What Ronsonic is saying is that your 35s are fine, and that you'll be just fine with 23s for your road riding.
Mavic has the specs for your particular rim here:
ETRTO compatible size: 622 x 15c
Recommended nipple length: 12 mm
Recommended rim tape: 622 x 18 x 0.6
Recommended tire widths: 19 to 28 mm
Valve hole diameter: 6.5 mm
So you can see that 35s are a bit more than Mavic recommends... they're just being cautious. There are many many people running 35s or wider on your rim or rims of that size. I have run 42s on the very similar CXP33 and the same width Open Pro with no ill effects. 23s are in the middle of the recommended range.