Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
The División de Honor de Álava or Arabako Ohorezko Maila is at the sixth level of Spanish football. All of the clubs are based in the province of Álava. The league consists of 18 teams. At the end of the season, the top club is promoted automatically to the Tercera División RFEF - Group 4. The teams finishing second play a promotion play-off depending on the number of vacancies in the Tercera División. Two clubs are relegated to Primera Regional.
The División de Honor de Guipúzcoa or Gipuzkoako Ohorezko Maila is at the sixth level of Spanish football. All of the clubs are based in the province of Gipuzkoa. The league consists of 18 teams. At the end of the season, the first team is promoted automatically to Tercera División RFEF - Group 4. The team finishing second plays a promotion play-off depending on the number of vacancies seats in the Tercera División. Four clubs are relegated to Regional Preferente.
The Preferente is played in two groups of 16 teams. At the end of the season, the champions and the winner of the playoff between the runners-up are promoted to División de Honor. Three clubs in each group are relegated to Primera Regional.
The Primera Regional is played with five groups of 8 teams. At the end of the season, the top four from each group advance to Fase de Ascenso while the other 16 teams play in Copa de Gipuzkoa. The Fase de Ascenso has two groups of 10 with the two winners and runners-up being promoted to Regional Preferente. The two 3rd placed finishers playoff to fill any vacancies.
Biscay
División de Honor de Vizcaya
Football league
Bizkaiko Ohorezko Maila División de Honor de Vizcaya
The División de Honor de Vizcaya or Bizkaiko Ohorezko Maila is at the sixth level of Spanish football. All of the clubs are based in the province of Biscay. The league consists of 18 teams. At the end of the season, the top club is promoted automatically to the Tercera División - Group 4. The teams finishing second play a promotion play-off depending on the number of vacancies in the Tercera División. Two clubs are relegated to Territorial Preferente.
The Preferente de Vizcaya is at the seventh level of Spanish football. All of the clubs are based in the province of Biscay. The league consists of 18 teams. At the end of the season, the top three clubs are promoted to División de Honor. Three clubs are relegated to the Primera División de Bizkaia.
The Primera División de Bizkaia is played in two groups of 18 teams. the champion and runner-up of both groups are promoted to Preferente de Bizkaia. The 3rd placed finishers play off to fill any vacancies. Two clubs in each group are relegated to the Segunda División de Bizkaia.
The Segunda División de Bizkaia is played in two groups of 16. At the end of the season, the two champions and runners-up are promoted to the Primera División de Bizkaia. the 3rd placed teams playoff to fill any vacancies. three clubs in each group are relegated to Tercera División de Bizkaia.
The Tercera División de Bizkaia is played with 74 teams in one group of 14 and five groups of 15. At the end of the season, the champions and runners-up are promoted. the 3rd placed teams advance to playoff league to fill any vacancies.