How are amendments to the nomination process of the DNC made?

Democrats on Saturday voted to chip away at the role party insiders
play in choosing the party’s presidential nominee in one of the
biggest changes to the process in decades.

The move to limit the influence of “superdelegates” at the party’s
convention ahead of the 2020 presidential primaries ended an emotional
and tumultuous two-year effort born out of the divisive 2016 contest
between Vermont Sen. Bernie Sanders and former Secretary of State
Hillary Clinton, who went on to become the Democratic nominee.

In a surprisingly united vote, almost all members of the Democratic
National Convention curtailed the ability of the superdelegates to
vote on the first ballot for the party’s presidential nominee
beginning with the next election. The group of about 700 automatic,
unpledged party leaders, elected officials and activists previously
were able to back whichever candidate for the nomination they chose.

https://www.cnn.com/2018/08/25/politics/democrats-superdelegates-voting-changes/index.html

I was reading about this article from 2018 and I was wondering how amendments to the DNC's nomination process are brought about. Is it like Congress where an amendment is drafted, is introduced, goes to a committee, subcommittee reviews it, committee marks it up, voting is done by the members of the DNC and then is made effective or not. Is it like that or is it a bit different since the DNC is a non-profit organization?