A new law called the Planning Bill is being proposed. You will see changes to how things are done. A national instrument can include rules for changing to the new way of doing things. A national instrument is like a set of instructions. You can think of it like a guide that helps people understand the new rules. It can include special rules for when the new law starts. The special rules are called transitional provisions. They help sort out how the new law affects things that were already happening. You might see these rules used to figure out how the new law affects existing matters or court cases.