The dictionary gives this definition of the word “rules”.
1. a principle or regulation governing conduct, action, procedure, arrangement, etc.: the rules of chess.
2. the code of regulations observed by a religious order or congregation: the Franciscan rule.
3. the customary or normal circumstance, occurrence, manner, practice, quality, etc.: the rule rather than the exception.
4. control, government, or dominion: under the rule of a dictator.
5. tenure or conduct of reign or office: during the rule of George III.
6. a prescribed mathematical method for performing a calculation or solving a problem.
7. ruler (def. 2).
8. (initial capital letter) Astronomy. the constellation Norma.
9. Printing. a thin, type-high strip of metal, for printing a solid or decorative line or lines.
a. a formal order or direction made by a court, as for governing the procedure of the court (general rule) or for sending the case before a referee (special rule).
b. a legal principle.
c. a court order in a particular case.
11. rules, Penology. (formerly)
a. a fixed area in the neighborhood of certain prisons within which certain prisoners were allowed to live.
b. the freedom of such an area.
12. Obsolete. behavior.
–verb (used with object)
13. to control or direct; exercise dominating power, authority, or influence over; govern: to rule the empire with severity.
14. to decide or declare judicially or authoritatively; decree: The judge ruled that he should be exiled.
15. to mark with lines, esp. parallel straight lines, with the aid of a ruler or the like: to rule paper.
16. to mark out or form (a line) by this method: to rule lines on paper.
17. to be superior or preeminent in (a specific field or group); dominate by superiority; hold sway over: For centuries, England ruled the seas.
–verb (used without object)
18. to exercise dominating power or influence; predominate.
19. to exercise authority, dominion, or sovereignty.
20. to make a formal decision or ruling, as on a point at law.
21. to be prevalent or current: Higher prices ruled throughout France.
22. rule out,
a. to prove to be unrelated or not for consideration; eliminate; exclude: to rule out the possibility of error.
b. to make impossible or impracticable: The rainstorm ruled out the holiday camping.
23. as a rule, generally; usually: He arrives at eleven o’clock, as a rule.
24. rule the roost. roost (def. 6).
1175–1225; (n.) ME riule, reule < OF riule < L rēgula straight stick, pattern (see regula ); (v.) ME riwlen, reulen, rewellen < OF riuler, rieuler, ruler < LL rēgulāre, deriv. of rēgula
1. standard, law, ruling, guide, precept, order. See principle. 4. command, domination, mastery, sway, authority, direction. 13. Rule, administer, command, govern, manage mean to exercise authoritative guidance or direction. Rule implies the exercise of authority as by a sovereign: to rule a kingdom. Administer places emphasis on the planned and orderly procedures used: to administer the finances of an institution. Command suggests military authority and the power to exact obedience; to be in command of: to command a ship. To govern is authoritatively to guide or direct persons or things, esp. in the affairs of a large administrative unit: to govern a state. To manage is to conduct affairs, i.e., to guide them in a unified way toward a definite goal, or to direct or control people, often by tact, address, or artifice: to manage a business. 14. order, judge.
Why does it not apply to everyone the same way?