SQL Server number of processors limitation and licenses

Question

In the following link by Microsoft they are showing the number of processors one instance of SQL Server is limited to use
Compute Capacity Limits by Edition of SQL Server
And also they are saying:
"These limits apply to a single instance of SQL Server. They represent the maximum compute capacity that a single instance will use. They do not constrain the server upon which the instance may be deployed. In fact deploying multiple instances of SQL
Server on the same physical server is an efficient way to use the compute capacity of a physical server with more sockets and/or cores than the capacity limits below."
My question:
Does this implies that when I licenses the server I licenses all server processors once regardless of the number SQL Server instances installed on that one server. 
For example if I have one server that has 32 cores. I have to buy licenses for all 32 cores once with amount X, but I can install as much instances as I want and the amount X will remain X, and it will not be:
X * number of instances installed 
... is this true ?

Answer 1

Thanks Diramoh... 
Just to make sure that you've answered what I've
exactly asked about:
ONLY under [Server+CAL] licensing model: If I paid amount X for license, this amount will NOT defer depending on
the number of SQL Server instances installed on ONE OS.
Example: if I paid 1000$ for licensing a server under
 [Server+CAL] licensing model, and I installed 1 instance of SQL Server, those 1000$ will remain 1000$ even if I install another two SQL server instances on the same OS where the 1st is installed.
Under Core-Base licensing model: If I paid amount X for licensing SQL Server on Y number of cores on ONE OSE, then I installed another N number of SQL Server on that same OSE, then the total amount for licensing will be X * N.
Example: if I paid 1000$ for licensing SQL Server Standard under Core-base licensing model on 4 core machine that has MS Windows Server 2008 R2, then I installed another SQL Server Standard edition on that same Windows Server, the total amount of licensing
will be 1000$ * 2 = 2000$
Please confirm the above two points are correct and that that what you meant to say.
Note: The numbers in the examples are just for example :)