The rules and options for selecting the subjunctive were presented in Section 3.4-3.6. The following will provide a brief review of this and present the guidelines for agreement of tenses within the subjunctive.
If the subject in the main clause expresses a personal opinion, emotion, doubt, fear or hope about another subject (in the dependent clause) then the latter will be in a subjunctive form (usually congiuntivo presente, or congiuntivo passato) or, as you can see in the last example below, a future indicative form.
*Since there is no “future subjunctive” mood, either congiuntivo presente or future indicative are used to express chronological sequence in a sentence like this.