Will the AI accept Expand Clerical Title?

Yes: it is accepted automatically.

How much does Expand Clerical Title cost?

Piety (varies) (patch 1.20.1.2).

Interaction · Religious actions

Expand Clerical Title

variesPietyBy God AloneAccepted automatically

Expand the recipient's Capital's Clerical Region into an adjacent De Jure Duchy controlled by … Rulers

What you need

You

To send it

Is at not War
Is not incapable
The target:
- Title tier exactly Duchy
- is_landless_type_title = no
- Is not the Head of Faith
- … or all its De Jure Counties must be held by ⟨faith⟩ Rulers
- If any de jure county › The archbishop temp: Must be adjacent to an existing Clerical Region held by …
- Otherwise: Already belongs to a Clerical Region
Also needed: not imprisoned

To see it in the menu

Is played by a person
If
a check the game hides
Then
- religious_head_or_challenger = this
Otherwise
- faith.main_rite.head_of_rite ?= this
Your faith: Has a Doctrine or Tenet with Has Clerical Region
Is an Adult

The character you target

To send it

Is an Adult
There are no De Jure Duchies without a Clerical Region, and controlled by ⟨faith⟩ Rulers, adjacent to … Capital Clerical Region
Also needed: not imprisoned

To see it in the menu

Is a ruler
Their faith is the same as that of actor
One of these
- Government is a Theocratic-type Government
- or
  Government is Ecclesiastical
this: … must hold the Clerical Region that contains their Capital
If
a check the game hides
Then
- religious_head_or_challenger = scope:puppet_or_actor
Otherwise
- faith.main_rite.head_of_rite ?= scope:puppet_or_actor

Which title you can pick

The target:
- Title tier exactly Duchy
- is_landless_type_title = no
- Is not the Head of Faith
- … or all its De Jure Counties must be held by ⟨faith⟩ Rulers
- If any de jure county › The archbishop temp: Must be adjacent to an existing Clerical Region held by …
- Otherwise: Already belongs to a Clerical Region

Expand Clerical Title is a religious character interaction in Crusader Kings III. You need: Is not imprisoned, Is at not War and Is not incapable. The character you target needs: Is not imprisoned, Is an Adult and There are no De Jure Duchies without a Clerical Region, and controlled by ⟨faith⟩ Rulers, adjacent to … Capital Clerical Region. Accepted automatically. It costs Piety (varies). It needs By God Alone. Patch 1.20.1.2, from game/common/character_interactions/pam_interactions.txt.

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Quick answers (3)

What are the requirements for Expand Clerical Title in CK3?: You: Is not imprisoned, Is at not War and Is not incapable. The character you target: Is not imprisoned, Is an Adult and There are no De Jure Duchies without a Clerical Region, and controlled by ⟨faith⟩ Rulers, adjacent to … Capital Clerical Region. (patch 1.20.1.2)
Will the AI accept Expand Clerical Title?: Yes: it is accepted automatically.
How much does Expand Clerical Title cost?: Piety (varies) (patch 1.20.1.2).

Will they accept?

The other character has no choice: the game accepts it automatically.

What happens

Effects

If
- The clerical region title:
  is_adjacent_to_clerical_region = scope:target_duchy
Then
- You:
  If
  Any character situation:
  situation_type = the_christian_church
  The current phase counts “A Clerical Region is expanded”
  Then
  The Christian Church: Counts toward the situation's next phase: “A Clerical Region is expanded”
  Their faith: Fervor increases by +3
- The clerical region holder:
  If
  a check the game hides
  Then
  Opinion: Grateful (+50)
  … Clerical Region expands into …

• the game's own tooltip text · ◦ our reading of the script line · code the script where neither exists

Who can use it and sees it (is_available, is_shown) (16 lines of game script)

is_available = is_ai = no
pam_is_clerical_title_authority_trigger = yes
faith ?= {
	has_doctrine_parameter = has_clerical_regions
}
has_pam_dlc_trigger = yes
is_adult = yes
is_shown = scope:recipient = {
	is_ruler = yes
	faith ?= scope:actor.faith
	pam_government_is_religious_playable_trigger = yes
	pam_acting_clerical_region_trigger = {
		ARCHBISHOP = this
	}
	pam_actor_is_clerical_title_authority_of_this_trigger = yes
}

As written in game/common/character_interactions/pam_interactions.txt.

Can be sent when (is_valid…) (13 lines of game script)

scope:actor = {
	is_imprisoned = no
	is_at_war = no
	is_incapable = no
}
scope:recipient = {
	is_imprisoned = no
	is_adult = yes
	custom_tooltip = {
		text = expand_ecclesiastical_title_no_eligible_target_tt
		pam_has_eligible_expand_ecclesiastical_title_target_trigger = yes
	}
}

As written in game/common/character_interactions/pam_interactions.txt.

Effects (on_send, on_accept, on_decline) (1 line of game script)

on_accept = pam_expand_ecclesiastical_title_interaction_effect = yes

As written in game/common/character_interactions/pam_interactions.txt.

Category: Religious actions
Cost: Piety: varies
Again on the same character: after 2 years
DLC: By God Alone
In the menu: under More…
ID: expand_ecclesiastical_title_interaction

Source: game/common/character_interactions/pam_interactions.txt and the English localisation, Crusader Kings III 1.20.1.2. “You” is the character who sends it (scope:actor, or a puppet acting for you); “the character you target” is the recipient. “…” marks words the game fills in at play time (a name, a title).