toe the line

follow, obey, observe the rules; abide by the rules; comply with the rules.

To toe the line, and to tow the line has been a longstanding debate. 'Tow the mark' is also a variant.
1. Toe the line, toe the mark, toe the plank. Although this goes back to individuals (men) line up toes along plank lines on a ship it still is used in the military even on tile floors, and sidewalks.
2. Tow the line, although many argue it's correct usage it is often seen in many song lyrics and thus needs to be addressed too. Tow the line (a rope) also nautical in origin can refer to an individual, a machine, or device. Tugboats tow lines and the ship must follow it. Crewmembers working as a combined force tow lines. Both mean to do as told, to fall in line, to follow the lead to do what is expected (needs to be done) whether a man or a machine. In a tug of war in a literal sense you must tow the line.

از قوانین یا سیاست‌ها بدون چون‌وچرا پیروی کردن.

🔸 توضیح کوتاه‌تر:
در گذشته، سربازها باید انگشت پایشان (toe) را روی خطی روی زمین می‌گذاشتند تا صف مرتب بماند. از آن گرفته شد که کسی «مطابق قانون یا دستور رفتار کند».

подчиняться требованиям; придерживаться правил; проводить определённую линию; поддерживать взгляды/программу