Rodong Sinmun Sunday says this in a bylined article.

Federal formula is the only way for peaceful reunification provided that the north and the south have differing ideologies and systems which they do not want to give up them, the article notes, and goes on:

The present ruling forces in south Korea have openly pursued treacherous and aggressive "unification of systems" while totally denying the June 15 joint declaration in which both sides agreed on reunification proposal. They adopted the "unification of system" as a policy and set out "three-stage unification proposal" comprising "peaceful community, economic community and community of nation."

The "three-stage unification proposal" diametrically runs counter to the proposal for reunification by federal formula as it denies coexistence of ideologies and systems in the north and the south.

In a word, it is aimed to enforce the ideology and system of south Korea on the DPRK. It is self-evident that the north-south relations will face a catastrophe as the south Korean authorities are working hard to realize their dream for "unification of systems" at any cost, opposed to the coexistence with the DPRK.

The issue of which mode the north and the south select for reunification is a vital issue which may lead the nation to peaceful reunification or national holocaust.

Differing ideologies and systems have long existed in the north and the south. It is impossible to avoid a war if one side coercively tries to change those of the other side. Koreans want peace, not war, and peaceful reunification by federal formula, not "unification of systems."

In order to eliminate catastrophe in the north-south relations and achieve peace and peaceful reunification on the Korean Peninsula it is necessary to abide by the proposal for reunification by federal formula based on coexistence.