Subject guides

Public international law for the Bar: the component candidates skip

The BATAS editorial team··4 min read

Political and Public International Law is one sitting, worth 15%, and the second half of its name is where candidates quietly give up. Public international law feels like a different discipline: unfamiliar vocabulary, instruments with long names, and no obvious connection to the Philippine statutes they have been reading all year.

The syllabus disagrees. It gives the international component a defined block with named instruments, which means it is markable — and that makes it one of the better returns on twelve hours of work in the whole review year.

What the syllabus actually names

Read the coverage as a list of what can be asked. In the openings and in the territory block, it names its authorities directly:

  • The U.N. Convention on the Law of the Sea (UNCLOS), and specifically its archipelagic provisions (Articles 46 to 50) and the sea lanes provisions (Articles 53 and 54).
  • The baseline statute (RA 9522) and the statutes on maritime zones and archipelagic sea lanes (RA 12064 and RA 12065).
  • The State — elements, sovereignty, immunity — which pairs with a specific statutory reference on the audit side (PD 1445, Sec. 26) and is examined as part of basic concepts rather than in a separate ghetto.

That is the concrete core. Everything else in the international block — sources, statehood, jurisdiction, immunities — is doctrine that hangs off it.

The order to study it in

Five movements, roughly twelve hours total:

1. Sources and the domestic relationship (3 hours)

Treaties, custom, general principles, and judicial decisions as subsidiary means. Then the question that generates Philippine exam questions: how does an international obligation become operative here? Learn the constitutional provisions on the adoption of international law, and the distinction between a treaty that requires implementing legislation and one that does not. This is the single most examinable idea in the block.

2. Statehood, recognition and sovereignty (2 hours)

The elements of a State, the concept of sovereignty, and the consequences — including the principle that a State is not ordinarily subject to another State's courts.

3. State immunity (2 hours)

The doctrine that a State may not be sued without its consent, the distinction between sovereign and commercial activity, and the ways consent is given. This is examined both here and in the basic-concepts block, so study it once and use it twice. Note the practical reach: questions about suing a government agency, or enforcing a judgment against public funds, are usually immunity questions wearing civil-procedure clothes.

4. The law of the sea (4 hours)

The most concrete and the most likely to be asked, because it links a treaty to a statute and to a map:

  • Baselines, and the archipelagic doctrine — a State's archipelagic nature, and the straight baseline method the Constitution and RA 9522 adopt.
  • The maritime zones, from internal waters through the territorial sea, the contiguous zone, the exclusive economic zone, the continental shelf, and the high seas — for each: how it is measured, and what rights the coastal State has inside it.
  • Archipelagic sea lanes passage, and the difference between innocent passage and the passage regimes the Convention creates.
  • How the domestic statutes implement all of it.

Learn this with a diagram, not a paragraph. A candidate who can sketch the zones and label the rights can answer any question the block produces.

5. Jurisdiction and immunities of persons (1 hour)

The bases of jurisdiction (territorial, nationality, protective, universal), and the diplomatic and consular immunities — who holds them, what they cover, and how they end.

The three questions that recur

"Is the treaty self-executing?" Answered by the provision's text and its nature: does it speak in terms of a right or an obligation that a court can apply, or does it contemplate legislation?

"May the State be sued?" Answered by the immunity doctrine and the sovereign-versus-commercial distinction, then by the mode of consent.

"What rights does the Philippines have in this zone?" Answered by naming the zone, its measurement, and the coastal State's rights and the other States' rights inside it.

Each has a shape — provision or instrument, test, application, consequence — which is the same shape described in the question shapes.

Where to put the hours

Twelve hours, spread across the year, in three sittings:

SittingWork
One evening earlySources and the domestic relationship: read the constitutional provisions, write the test for self-execution
A weekend in the middleImmunity: the doctrine, the commercial-activity distinction, and one worked example of suing an agency
A weekend near the endLaw of the sea: draw the zones, state the rights in each, then answer three past questions

Then keep it alive with the retrieval block. Twelve hours of input plus fifteen minutes a month of recall is enough to hold a block that a majority of candidates cannot answer at all — which is the definition of cheap marks.

Why candidates skip it, and why that is a mistake

The reasons are understandable: it is unfamiliar, it looks small, and the vocabulary is not used anywhere else in the review year. But the arithmetic is unforgiving. The sitting is 15%, the international block is a defined part of the syllabus, and questions on it are often more concrete than the constitutional ones — a zone has a measurement and a rule, a treaty has a text, an immunity has a test.

The candidate who skips it is not saving twelve hours. They are choosing to answer fewer questions than the paper asks. In a paper where every problem is worth 5%, that is a decision worth revisiting.

For the rest of the sitting, see how to study Political and Public International Law; for the structure that provides the vocabulary, see the constitutional structure.

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Written by the BATAS editorial team. This article is a study aid, not legal advice, and the law it describes is stated as of 20 October 2026 — verify against the official text before relying on it. How we write and check these articles: editorial standards.