What is the default Coronation Laws game rule in CK3?

Default: The Uncrowned Law will damage Legitimacy and Opinion for Kings and Emperors until they hold a Coronation. (patch 1.20.1.2)

Does changing the Coronation Laws rule disable achievements?

No: none of its 3 settings carries the flag blocks_achievements in patch 1.20.1.2.

Game rule · Difficulty · Tweaks

Coronation Laws

Default
Crowned Imperial Accession
No Coronation Laws

Coronation Laws is a game rule in Crusader Kings III (Difficulty and Tweaks) with 3 settings: Default (the default), Crowned Imperial Accession and No Coronation Laws. None of its settings disables achievements. Patch 1.20.1.2, from game/common/game_rules/00_game_rules.txt.

This section as JSON: /raw/game-rules.json

Quick answers (2)

What is the default Coronation Laws game rule in CK3?: Default: The Uncrowned Law will damage Legitimacy and Opinion for Kings and Emperors until they hold a Coronation. (patch 1.20.1.2)
Does changing the Coronation Laws rule disable achievements?: No: none of its 3 settings carries the flag blocks_achievements in patch 1.20.1.2.

3 settings

Default
Default
The Uncrowned Law will damage Legitimacy and Opinion for Kings and Emperors until they hold a Coronation.
coronation_laws_on
Crowned Imperial Accession
Kings will not become Uncrowned when they ascend to Emperor-Tier.
The script checks it 2 times, in 2 places
Decisions 1
- nomad_higher_tier_title_decision
On actions (the game's own hooks) 1
- on_rank_up
Every has_game_rule = coronation_laws_no_imperial_uncrowned in game/common and game/events, by the top-level object it sits in.
coronation_laws_no_imperial_uncrowned
No Coronation Laws
High-Tier Rulers do not have the Uncrowned Law, and are not required to hold Coronations. AI will hold Coronations less frequently. This makes the game easier.
The script checks it 31 times, in 16 places
On actions (the game's own hooks) 4
- on_death
- on_game_start
- on_government_change
- on_rank_up
Events 3
Laws 3
Scripted effects 3
Activities 1
- Coronation
Decisions 1
- nomad_higher_tier_title_decision
Character interactions 1
- Request Anointment
Every has_game_rule = coronation_laws_off in game/common and game/events, by the top-level object it sits in.
coronation_laws_off

Source: game/common/game_rules/00_game_rules.txt line 1599 (key coronation_laws), modifiers from game/common/modifiers, names from the English localisation; Crusader Kings III 1.20.1.2.