Please look at the HRC General Comment No. 32 on article 14: Right to equality before courts and tribunals and to a fair trial.
The right to equality before the courts and tribunals and to a fair trial is a key element of human rights protection and serves as a procedural means to safeguard the rule of law. Article 14 of the Covenant aims at ensuring the proper administration of justice, and to this end guarantees a series of specific rights.

View HRC General Comments here