Iodine monochloride reacts with hydrogen according to the equation :

$2\mathrm{ICl}\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)\to {\mathrm{I}}_2\left(\mathrm{g}\right)+2\mathrm{HCl}\left(\mathrm{g}\right)$

The rate data below have been obtained.

[ICI], M	$\left[{\mathrm{H}}_2\right]$, M	Initial Rate, $\mathrm{M}.{\mathrm{s}}^{-1}$
0.10	0.10	0.030
0.20	0.10	0.060
0.10	0.050	0.015

What is the rate law for the reaction?