I'd like to make a building require an ability on one of my champions. 

my code currently has the academy available from turn 1 without meeting the desired prereq.

<AbilityBonus InternalName="GovernorAcademyAbility">
<AbilityBonusType>Unit_Level</AbilityBonusType>
<AbilityBonusOption InternalName="GovernorAcademy">
<DisplayName>Governor's Academy</DisplayName>
<Description>Allows the construction of a Governor's Academy, which grants 5xp / turn to champions stationed in the city it is constructed in.</Description>
<Icon>Ability_PathOfTheGovernor_Icon.png</Icon>
<HideWhenUpgraded>0</HideWhenUpgraded>
<Likelihood>1000000000</Likelihood>
<RarityDisplay>Rare</RarityDisplay>
<MinimumLevel>1</MinimumLevel>
<Type>Army</Type>
<!--<Prereq>
<Type>AbilityBonusOption</Type>
<Target>Unit</Target>
<Attribute>PathOfTheGovernor</Attribute>
</Prereq> -->
<AIData AIPersonality="AI_General">
<AIPriority>5</AIPriority>
</AIData>
</AbilityBonusOption>
</AbilityBonus>

<ImprovementType InternalName="GovernorsAcademy">
<DisplayName>Governor's Academy</DisplayName>
<Description>The Governor's Academy Grants 5 experience per turn to stationed champions 1 per faction.</Description>
<AllowedPerFaction>1</AllowedPerFaction>
<RequiresCity>1</RequiresCity>
<BarredTerrain>River</BarredTerrain>
<BarredTerrain>SwampTerrain</BarredTerrain>
<PreferredTerrain>City</PreferredTerrain>
<PreferredTerrain>Category:Land</PreferredTerrain>
<PreferredTerrain>Forest</PreferredTerrain>
<Prereq>
<Type>AbilityBonusOption</Type>
<Attribute>GovernorAcademyAbility</Attribute>
</Prereq>
<LaborToBuild>100</LaborToBuild>
<GameModifier>
<ModType>StationedUnitStatBonus</ModType>
<StrVal>UnitStat_Experience</StrVal>
<StrVal2>OnlyChampions</StrVal2>
<Value>5</Value>
<Provides>Stationed champions have a 25% chance of getting 1xp/season</Provides>
</GameModifier>

<AIData AIPersonality="AI_General">
<AIPriority>5</AIPriority>
<AITag>CommandPost</AITag>
</AIData>
<ArtDef>Art_AdventurersGuild</ArtDef>
</ImprovementType>