What law?
Are you speaking for everyone everywhere? In Colorado we have specific exemptions for turning left or when the road is hazardous. AKA as far to the right as practical.
This reminds me of a motorist who was annoyed at me left justifying at an intersection. He started with the standard "I'm a cyclist also". Then followed up with riding to the right while cycling down a street and at an intersection. 2 problems: 1) I hate being right hooked at an intersection 2) There was a line of parked cars on the right. duh

Anyhow, anyone who says that a cyclist must ride to the right all the time is sadly mistaken.

Not to mention the one way downtown streets where we ride in whatever lane we choose. I need to take a left I am riding in the left lane. Plus, due to traffic I can do the same speed as the cars.