Three reading tasks, and a clock you share
The three tasks are multiple choice over two texts, a set of binary matchings across two contrasted texts, and one text with open-ended questions. The middle task is the distinctive one: two texts that take different positions, and ten judgements about which text says what. It punishes reading each text separately and remembering neither.
Because Parte A and Parte B are timed together, your pacing decision is made before you start, not during. The awarding body publishes the combined duration and the reading item count, and both are printed on this page with their source.