The FA has had an interview with the Nonleague Paper & an explanation on the promotions/relegations for the end of next season 2019-20. Plus a few maps showing the changes.
Step 1: stays the same.
Step 2: only difference is 2 relegations from each league.
Step 3: champions promoted & 7 playoff winners. 2 bottom placed clubs relegated from each league, plus a further 2 3rd bottom placed clubs on a ppg basis.
Step 4: 2 promotions per league(x1 automatic & x1 via playoffs). 7 bottom placed clubs will face a one game playoff against step 5 clubs.
Step 5: 14 champions plus the top 3 in the NWCL, NL & NCEL will be promoted. Followed by 4 runners up on a ppg in the remaining leagues. The remaining 7 runners up will face a playoff against the bottom placed step 4 clubs.
Step 6: the SWPL will promote 2 clubs from its 2 leagues. The remaining 18 leagues will promote the top 4. The bottom 2 clubs are liable for relegation.
So, finish in the top four next season and you will be promoted. Which hoys vase exemption by virtue of league position out of the window as if you finish in the top four you won't be playing in the Vase in the following season. Oyvey, oyvey, oyvey.