Which type of method in Python is not bound to either the class or instances and does not receive the class or instance as its first argument?

The type of method in Python that is not bound to either the class or instances and does not receive the class or instance as its first argument is called a Static Method.

Here is a step by step explanation:

1. In Python, there are three types of methods: Instance Methods, Class Methods, and Static Methods.

2. Instance Methods are bound to the instance of the class and hence can access the instance variables and class variables. The first argument to an instance method is always 'self' which is a reference to the instance of the class.

3. Class Methods are bound to the class and not the instance of the class. They can't access the instance variables but can access and modify the class variables. The first argument to a class method is always 'cls' which is a reference to the class.

4. Static Methods are not bound to either the class or the instance. They work like regular functions but belong to the class's namespace. They can't access the instance variables or class variables unless they are passed as arguments. Static methods in Python are defined using the @staticmethod decorator.

Here is an example of a static method:

class MyClass:
    @staticmethod
    def my_static_method(arg1, arg2):
        # do something with arg1 and arg2
        pass

In this example, my_static_method is a static method that does not receive the class or instance as its first argument.