English: bright line rule
Welsh: rheol llinell bendant
Subject: Cyfraith
Welsh definition: A bright-line rule (or bright-line test) is a clearly defined rule or standard, composed of objective factors, which leaves little or no room for varying interpretation. The purpose of a bright-line rule is to produce predictable and consistent results in its application. The term "bright-line" in this sense generally occurs in a legal context.
Welsh context: I grynhoi, yng ngoleuni'r holl gyfraith achosion berthnasol ac ar sail tystiolaeth wrthrychol, ystyrir bod modd cyfiawnhau rheol llinell bendant.