Local function declarations are now permitted to have [attributes](../../spec/attributes.md). Parameters and type parameters on local functions are also allowed to have attributes.
Attributes with a specified meaning when applied to a method, its parameters, or its type parameters will have the same meaning when applied to a local function, its parameters, or its type parameters, respectively.
A local function can be made conditional in the same sense as a [conditional method](../../spec/attributes.md#the-conditional-attribute) by decorating it with a `[ConditionalAttribute]`. A conditional local function must also be `static`. All restrictions on conditional methods also apply to conditional local functions, including that the return type must be `void`.
The `extern` modifier is now permitted on local functions. This makes the local function external in the same sense as an [external method](../../spec/classes.md#external-methods).
Similarly to an external method, the *local-function-body* of an external local function must be a semicolon. A semicolon *local-function-body* is only permitted on an external local function.