The teams were divided into four zones with nine teams (a total of 36 teams) in each zone and it was played in a round-robin tournament whereby each team played each one of the other teams two times. The teams placed 1st to 4th from each zone qualified for the Second Stage. The remaining twenty three teams qualify for the Revalida Stage.[1]
Championship stages
Second stage
The teams were divided into two zones with eight teams each and it was played in a round-robin tournament whereby each team played each one of the other teams one time. The teams first and second place and the best third place team from the two zones qualified for the Third Stage or Pentagonal Final. The remaining third place team qualify for the Third Phase of the Revalida Stage. The other ten teams qualify for the Second Phase of the Revalida Stage.
Third stage
The five teams that qualified for the third stage or Pentagonal Final play in a round-robin tournament whereby each team played each one of the other teams one time. The winner was declared champion and automatically promoted to the Primera B Nacional. The other four teams qualify for the Fourth Phase of the Revalida Stage.[1]
Revalida Stages
The Revalida Stage is divided in several phases: First, the twenty teams that did not qualify for the Championship Stages were divided into the same four zones of the First Stage and it was played in a round-robin tournament whereby each team played each one of the other teams two times. The first place team of each zone qualified for the Second Phase. The second phase is played between the four teams that qualified from the First Phase and the ten teams that qualified from the Second Stage of the Championship Stage. The seven winners qualify for the Third Phase.
The Third Phase is played between the seven teams that qualified from the Second Phase and the team that qualified from the Second Stage of the Championship Stage. The four winners qualify for the Fourth Phase.
The Fourth Phase is played between the four teams that qualified from the Third Phase and the four teams that qualified from the Third Stage of the Championship Stage. The four winners qualify for the Fifth Phase. The Fifth and Sixth Phase is played between the remaining teams and aims to get the Second promotion to the Primera B Nacional.
Relegation
After the First Phase of the Revalida Stage a table was drawn up with the average of points obtained in the First Stage and the First Phase of the Revalida Stage. It is determined by dividing the points by the number of games played and the bottom team of each four zones was relegated to the Torneo Regional Federal Amateur. Following the Revalida Stage, another table was drawn up with the remaining teams that played the Revalida Stage and the bottom four teams were relegated to the Torneo Regional Federal Amateur, giving a total of eight teams relegated.[1]
Updated to match(es) played on April 29, 2019. Source: AFA Rules for classification: 1) points; 2) goal difference; 3) goals scored; 4) draw of lots. (C) Champions; (P) Promoted
^The match between Deportivo Roca and Ferro Carril Oeste (GP) in the round 9 of the Revalida was awarded to Deportivo Roca a 1–0 win as a result of Ferro Carril Oeste (GP) fielding an ineligible player. Originally the match ended in a 1–1 draw.[2]
^ abThe match between Independiente (N) and Deportivo Roca in the round 10 of the Revalida was awarded as a 0–1 loss for both teams as a result of Independiente (N) fielding an ineligible player. Independiente (N) originally won the match 4–1.[3]
Updated to match(es) played on unknown. Source: AFA Legend: Blue = home team win; Yellow = draw; Red = away team win. Notes:
^The Deportivo Roca - Ferro Carril Oeste (GP) match was awarded as a 1–0 win to Deportivo Roca, after Ferro Carril Oeste (GP) fielded an ineligible player. Originally the match ended in a 1–1 draw.
^The Independiente (N) - Deportivo Roca match was awarded as a 0–1 loss for both teams, after Independiente (N) fielded an ineligible player. Independiente (N) originally won the match 4–1.
^ abSportivo Las Parejas ahead of Defensores (P) on head-to-head points: Sportivo Las Parejas–Defensores (P) 1–0, Defensores (P)–Sportivo Las Parejas 0–0.
^ abJuventud Unida (G) ahead of Atlético Paraná on head-to-head away goals scored: Atlético Paraná–Juventud Unida (G) 1–1, Juventud Unida (G)–Atlético Paraná 0–0.
^The match was suspended in the 49th minute with Alvarado winning 1-0, after San Jorge (T) players held a sit-down protest during the 2nd leg, protesting a bad performance of the referee. The match was awarded to Alvarado, who was promoted, and San Jorge will be relegated to the Torneo Federal Amateur in 2020. "FEDERAL A: San Jorge fue sancionado con la pérdida de la categoría y multa económica" (in Spanish).