What is the scope of the template reference variable in Angular?

What is the scope of the template reference variable in Angular?

I can not find a clear answer to my question in documentation. Even though empirically I can say that the whole template can access the template reference variable.

1 Is it the case? Is the template reference variable guaranteed to be accessible in the whole template?

2 Or is the template reference variable accessible only in the child and sibling elements of the element which is referenced by the template reference variable?

Over here I found the following statement:

Use template variables to refer to elements — The newHero template variable refers to the <input> element. You can reference newHero from any sibling or child of the <input> element.
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Does it mean that only the 2 is guaranteed by Angular?

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