What are the main ethical principles that a lawyer must follow according to the Brazilian Bar Association (OAB)? I- Preserve, in their conduct, the...

What are the main ethical principles that a lawyer must follow according to the Brazilian Bar Association (OAB)?
I- Preserve, in their conduct, the honor, nobility, and dignity of the profession, zealously guarding its essential and indispensable character;
II- Act with fearlessness, independence, honesty, decorum, truthfulness, loyalty, dignity, and good faith;
III- Watch over their personal and professional reputation;
IV- Permanently strive for their personal and professional improvement;
V- Contribute to the improvement of institutions, law, and legislation;
VI- Encourage conciliation between litigants, preventing, whenever possible, the initiation of disputes;
VII- Advise the client not to engage in judicial adventures;
VIII- Refrain from:
a) Using undue influence, to their benefit or that of the client;
b) Representing interests related to other activities unrelated to the practice of law, in which they also act;
c) Linking their name to ventures that are manifestly dubious;
d) Assisting those who violate ethics, morals, honesty, and human dignity;
e) Dealing directly with the opposing party who has appointed counsel, without their consent.
IX- Advocate for the solution of citizenship problems and the realization of their individual, collective, and diffuse rights, within the community.
Art. 3- The lawyer must be aware that the law is a means of mitigating inequalities to find fair solutions and that the law is an instrument for guaranteeing equality for all.
Art. 4- The lawyer linked to the client or constituent, through an employment relationship or by a permanent service contract, as a member of a legal department or legal advisory body, public or private, must ensure their freedom and independence.
Art. 5- The practice of law is incompatible with any commercialization procedure.
Art. 6- It is forbidden for the lawyer to deliberately falsify facts in court or rely on bad faith.
Art. 7- The offering of professional services that directly or indirectly imply the inculcation or capture of clients is prohibited. In which they have collaborated, guided, or known in consultation; likewise, they must decline their ethical impediment when invited by the other party, if they have revealed secrets or obtained their opinion. They must agree on their fees in advance with the substitute.
Chapter III - Professional Secrecy
Art. 25. Professional secrecy is inherent to the profession, imposing its respect, except in cases of serious threat to the right to life, honor, or when the lawyer is confronted by the client and, in self-defense, has to reveal a secret, but always restricted to the interest of the case.
Art. 26. The lawyer must maintain confidentiality, even in judicial testimony, about what they know by virtue of their office, and may refuse to testify as a witness in a process in which they have worked or should work, or about a fact related to a person for whom they are or have been a lawyer, even if authorized or requested by the constituent.
Art. 27. The confidences made to the lawyer by the client can be used within the limits of the defense's necessity, provided that the constituent authorizes it.
Sole paragraph. Epistolary communications between a lawyer and a client are presumed to be confidential and cannot be revealed to third parties.
Chapter IV - Advertising
Art. 28. The lawyer may advertise their professional services, individually or collectively, with discretion and moderation, for exclusively informative purposes, prohibited from being disclosed in conjunction with another activity.
Art. 29. The announcement must mention the lawyer's full name and the registration number with the OAB, and may refer to professional titles or qualifications, technical specialization.