Inium is a Latin word that means "Owning property together." That's what it is like when someone buys a condo unit. They have an "interest" in the land beneath the building, but the building's association owns the actual land.
Ownership of a inium unit is evidenced by a inium certificate of title. With respect to real property other than land and inium units, there is no system that is equivalent to the Torrens system for registration under which a document is issued to evidence the owner's title.
Your inium doesn't have a lifespan, but the corporation managing it has one. In the Philippines, 50 years is the lifespan of all companies and corporations, big or small. However, the corporation can still be renewed for another 50 years, so your inium ownership does not necessarily end at that point.
When a common interest development deteriorates to the point that basic safety and habitability are called into question, the local government authority must act to either force the owners to repair it, or failing that, to close it down.
The ownership of these condos might differ; they might be leasehold or freehold. One of the main differences between these types is that in leasehold condos, you only own the right to operate your unit for a specific period. In freehold condos, you have full ownership rights forever.
"Owning:" Why Condo Owners Don't Own the Land. One of the main differences between buying a house versus buying a condo is that condo owners are not landowners. A condo owner is purchasing an "interest" in the condo association that runs the day-to-day operations of the building, similar to a homeowners association.
A inium (or condo for short) is an ownership regime in which a building (or group of buildings) is divided into multiple units that are either each separately owned, or owned in common with exclusive rights of occupation by individual owners.