All decisions have a scaling cost depending on planet size - the larger the planet the more expensive the district. The Ecumenopolis/Habitable Structure/Ringworld decisions are much more expensive than the normal decisions, to reflect their increased benefit, particularly in the case of Ringworlds.

Planets Only

Requires either: Voidborn, Mastery of Nature, or the "Weather Control Systems" Engineering tech.

If the planet is smaller than size 14, it adds 4 Technician Jobs, 2 Max Districts, 2 Energy Districts, +5% Happiness, +10% Technician Output, and +10% Planetary Orbital Bombardment Damage.
If the planet is size 14 - 22, it adds 5 Technician Jobs, 3 Max Districts, 3 Energy Districts, +5% Happiness, +10% Technician Output, and +15% Planetary Orbital Bombardment Damage.
If the planet is larger than size 22, it adds 6 Technician Jobs, 4 Max Districts, 4 Energy Districts, +5% Happiness, +10% Technician Output, and +20% Planetary Orbital Bombardment Damage.
If the planet is an Ecumenopolis, then it adds 6 Technician Jobs, 4 Max Districts, +5% Happiness, +10% Technician Output, and +20% Planetary Orbital Bombardment Damage.


Planets Only

Requires either: Arcology Project, Mastery of Nature, the "Construction Templates" tech, or the "Anti-Gravity Engineering" tech.

If the planet is smaller than size 11, it adds 4 miner jobs, 2 Max Districts, 2 Mining Districts, +5% Happiness, +10% Miners Output, -10% Planetary Orbital Bombardment Damage, and +10% Crime.
If the planet is size 11-16, it adds 5 Miner jobs, 3 Max Districts, 3 Mining Districts, +5% Happiness, +10% Miners Output, -15% Planetary Orbital Bombardment Damage, and +15% Crime.
If the planet is size 17-19, it adds 6 Miner jobs, 4 Max Districts, 4 Mining Districts, +5% Happiness, +10% Miners Output, -20% Planetary Orbital Bombardment Damage, and +20% Crime.
If the planet is larger than size 20, it adds 7 Miner jobs, 5 Max Districts, 5 Mining Districts, +5% Happiness, +10% Miners Output, -25% Planetary Orbital Bombardment Damage, and +25% Crime.
If the planet is an Ecumenopolis, then it adds 6 Miner jobs, 4 Max Districts, +5% Happiness, +10% Miners Output, -20% Planetary Orbital Bombardment Damage, and +20% Crime.


Planets, Ringworlds, Habitable Structures

Requires either: "Administrative AI" tech, "Adaptive Bureaucracy" tech.

For Normal Empires:
If the planet is smaller than size 23, it adds 3 Clerk Jobs, 2 Enforcers, 1 Administrator, 2 Max Districts, +5% Happiness, +10% Trade Value, and -10% Pop Consumer Goods Upkeep.
If the planet is larger than size 22, it adds 4 Clerk Jobs, 3 Enforcers, 2 Administrators, 3 Max Districts, +5% Happiness, +10% Trade Value, and -15% Pop Consumer Goods Upkeep.
If the planet is a ringworld, it adds 12 Clerk Jobs, 8 Enforcers, 4 Administrators, 2 Max Districts, +5% Happiness, +10% Trade Value, and -15% Pop Consumer Goods Upkeep.
If the planet is an Ecumenopolis, it adds 12 Clerk Jobs, 8 Enforcers, 4 Administrators, 3 Max Districts, +5% Happiness, +10% Trade Value, and -15% Pop Consumer Goods Upkeep.
If the planet is actually a habitable structure, it adds 3 Clerk Jobs, 2 Enforcers, 1 Administrator, 2 Max Districts, +5% Happiness, +10% Trade Value, and -10% Pop Consumer Goods Upkeep

For Machine Empires:
If the planet is smaller than size 23, it adds 3 Maintenance Drones, 1 Patrol Drone, 1 Replicator, 1 Coordinator, 2 Max Districts, +5% Happiness, +10% Trade Value, and -10% Pop Energy Upkeep.
If the planet is larger than size 22, it adds 4 Maintenance Drones, 2 Patrol Drones, 1 Replicator, 2 Coordinators, 3 Max Districts, +5% Happiness, +10% Trade Value, and -15% Pop Energy Upkeep.
If the planet is a ringworld, it adds 12 Maintenance Drones, 6 Patrol Drones, 2 Replicators, 4 Coordinators, 2 Max Districts, +5% Happiness, +10% Trade Value, and -15% Pop Energy Upkeep.
If the planet is an Ecumenopolis, it adds 12 Maintenance Drones, 6 Patrol Drones, 2 Replicators, 4 Coordinators, 3 Max Districts, +5% Happiness, +10% Trade Value, and -15% Pop Energy Upkeep.
If the planet is actually a habitable structure, it adds 3 Maintenance Drones, 1 Patrol Drone, 1 Replicator, 1 Coordinator, 2 Max Districts, +5% Happiness, +10% Trade Value, and -10% Pop Energy Upkeep.

For Hive Empires:
If the planet is smaller than size 23, it adds 3 Maintenance Drones, 2 Patrol Drones, 1 Synapse Drone, 2 Max Districts, +5% Happiness, +10% Trade Value, and -10% Pop Food Upkeep.
If the planet is larger than size 22, it adds 4 Maintenance Drones, 3 Patrol Drones, 2 Synapse
Drones, 2 Max Districts, +5% Happiness, +10% Trade Value, and -10% Pop Food Upkeep.
If the planet is a ringworld, it adds 4 Maintenance Drones, 3 Patrol Drones, 2 Synapse Drones, 2 Max Districts, +5% Happiness, +10% Trade Value, and -15% Pop Food Upkeep.
If the planet is an Ecumenopolis, it adds 4 Maintenance Drones, 3 Patrol Drones, 2 Synapse Drones, 3 Max Districts, +5% Happiness, +10% Trade Value, and -15% Pop Food Upkeep.
If the planet is actually a habitable structure, it adds 3 Maintenance Drones, 2 Patrol Drones, 1 Synapse Drone, 2 Max Districts, +5% Happiness, +10% Trade Value, and -10% Pop Food Upkeep.


Planets, Ringworlds, Habitable Structures

Requires: "Eco Simulation" tech.

For Normal Empires, Biological Hives, or Machine Empires that use food:
If the planet is smaller than size 14, it adds 4 Farmers, 2 Max Districts, 2 Farming Districts, +5% Happiness, and +10% Farmer Food Production.
If the planet is size 14-19, it adds 5 Farmers, 3 Max Districts, 3 Farming Districts, +5% Happiness, and +10% Farmer Food Production.
If the planet is larger than size 19, it adds 6 Farmers, 4 Max Districts, 4 Farming Districts, +5% Happiness, and +10% Farmer Food Production.
If the planet is a ringworld, it adds 8 farmers, 2 Max Districts, 2 Farming Districts, +5% Happiness, and +10% Farmer Food Production.
If the planet is an Ecumenopolis, it adds 6 Farmers, 4 Max Districts, +5% Happiness, and +10% Farmer Food Production.
If the planet is actually a habitable structure, it adds 6 Farmers, 2 Max Districts, +5% Happiness, and +10% Farmer Food Production.

For Machine Empires that do not use food:
If the planet is smaller than size 14, it adds 4 Technician Drones, 2 Max Districts, 2 Energy Districts, +5% Happiness, and +10% Technician Energy Production.
If the planet is size 14-19, it adds 5 Technician Drones, 3 Max Districts, 3 Energy Districts, +5% Happiness, and +10% Technician Energy Production.
If the planet is larger than size 19, it adds 6 Technician Drones, 4 Max Districts, 4 Energy Districts, +5% Happiness, and +10% Technician Energy Production.
If the planet is a ringworld, it adds 8 farmers, 2 Max Districts, 2 Energy Districts, +5% Happiness, and +10% Technician Energy Production.
If the planet is an Ecumenopolis, it adds 6 Technician Drones, 4 Max Districts, +5% Happiness, and +10% Technician Energy Production.
If the planet is actually a habitable structure, it adds 6 Technician Drones, 2 Max Districts, +5% Happiness, and +10% Technician Energy Production.

For Lithoid Empires:
If the planet is smaller than size 14, it adds 4 Miners, 2 Max Districts, 2 Mining Districts, +5% Happiness, and +10% Miner Minerals Production.
If the planet is size 14-19, it adds 5 Miners, 3 Max Districts, 3 Mining Districts, +5% Happiness, and +10% Miner Minerals Production.
If the planet is larger than size 19, it adds 6 Miners, 4 Max Districts, 4 Mining Districts, +5% Happiness, and +10% Miner Minerals Production.
If the planet is a ringworld, it adds 8 farmers, 2 Max Districts, 2 Mining Districts, +5% Happiness, and +10% Miner Minerals Production.
If the planet is an Ecumenopolis, it adds 6 Miners, 4 Max Districts, +5% Happiness, and +10% Miner Minerals Production.
If the planet is actually a habitable structure, it adds 6 Miners, 2 Max Districts, +5% Happiness, and +10% Miner Minerals Production.


Mastery of Nature
If the planet is smaller than size 11, it adds 2 Max Districts.
If the planet is size 11-16, it adds 3 Max Districts.
If the planet is larger than size 16, it adds 4 Max Districts.

Arcology Project/Restore Ecumenopolis
Arcology Project Cost scales according to planet size - for sizes:
Smaller than 11, 11-15, 16-20, 20-25, or Larger than 25.

Both Decisions can also now be taken by Rogue Servitors - as they can use consumer goods.