Short answers, pulled from the story.
A Decree of the President of Russia carries the weight of a by-law within the Russian legal system. This status places it alongside Decrees of the Government and instructions from other officials.
Normative acts enter into force seven days after their first official publication across the entire territory. Official publication of presidential acts must occur within ten days after signing.
Presidential decrees cannot alter existing laws that possess higher authority because they remain subordinate to any law or obligation that supersedes them. Federal Constitutional Laws and Federal Laws take precedence over all presidential actions.
This conflict became known as the war of laws during 1992 and 1993 when presidential decrees issued by Yeltsin were frequently overturned by separate legislation adopted by the parliament. The situation reached its peak in October 1993 when Yeltsin ordered troops to shoot at the parliament building.
International agreements now stand lower than state obligations after the 2020 constitutional referendum. These shifts ensure that presidential power remains subordinate to higher legal frameworks.