Are Stickerless cubes legal?

Related questions

1. What is WCA shipping?
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3. What does WCA Hospital stand for?
4. What is WCA audit?
5. How do you become a member of the WCA?
6. What is Feliks Zemdegs PB?
7. Does Feliks Zemdegs have any siblings?
8. What is SQP audit?
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Tags

1. #pillowing
2. #puzzles
3. #where
4. #compete
5. #however
6. #shouldn
7. #problem
8. #allowed
9. #reasons
10. #actual
11. #legal
12. #prove
13. #certainly
14. #pillowed
15. #because
16. #cubes
17. #puzzle
18. #allow
19. #stickerless
20. #should