Analysis of information sources in references of the Wikipedia article "Peter Paul Brennan" in English language version.
Though, by virtue of his episcopal status, Milingo is capable of validly ordaining the men, they are not considered Roman Catholic Bishops due to their schismatic act.
As a bishop, Milingo technically has the authority to ordain other bishops. But under church rules, only bishops authorized by the pope are considered bishops in good standing. The four consecrations are technically "valid" even if they are not "licit," according to the Rev. Philip Goyret, a professor of dogmatic theology with expertise in canon law at the Pontifical University of the Holy Cross in Rome. That means the Vatican cannot deny the inherent authority of the newly installed bishops, even if they do not consider them in formal communion with Pope Benedict XVI. Precedence for such scenarios include the Catholic-Orthodox split in 1054 and the schism between the traditionalist followers of the late Archbishop Marcel Lefebvre, who broke with Rome in 1988, after consecrating four priests as bishops in the Society of Pius X. "Episcopal consecrations carried out without the orders or consensus of the pontiff are valid," Goyret said.