Let \(0\le q\le 1\) and \({\mathbb {N}}\) denote the set of all positive integers. In this paper (which is a continuation of [17]) we will be interested in the family \({\mathcal {U}}(x^q)\) of all regularly distributed sets \(X \subset {\mathbb {N}}\) whose ratio block sequence of type (1.1) is asymptotically distributed with distribution function \(g(x) = x^q;\ x \in [0,1]\) . We will study the structure of these families with respect to the union, intersection and difference of the sets \(X\in {\mathcal {U}}(x^p)\) , \(Y\in {\mathcal {U}}(x^q)\) , where \(0\le p, q\le 1.\)