def _supports_iam(version):
    """Check the meta-data version for IAM support

    API versions before 2012-01-12 don't support the iam/ subtree.
    This function works because:
    >>> '1.0' < '2007-01-19' < '2014-11-05' < 'latest'
    True
    """
    return version >= '2012-01-12'
