Before revision:   For a given multi-variate survival function  H of generalised \overline  frailty type we construct subsequently an explicit solution to the corresponding IFPT with the barrier level fixed at zero.
After revision:  We provide an explicit characterization of such distributions, which is a result of independent interest. For a given multi-variate survival function  H of generalised \overline frailty type we construct subsequently an explicit solution to the corresponding IFPT with the barrier level fixed at zero.