Calling custom module UrlAuthorization with every page load

I have implemented a custom UrlAuthorization module as shown here

The code looks like this:

public class CustomUrlAuthorizationModule : IHttpModule 
    {
        public void Init(HttpApplication context)
        {
            context.AuthorizeRequest += new EventHandler(context_AuthorizeRequest);
        }



        void context_AuthorizeRequest(object sender, EventArgs e)
        {
            HttpApplication context = (HttpApplication)sender;

            if (context.User != null && context.User.Identity.IsAuthenticated)
            {
                HttpContext _httpContext = context.Context;
                SiteMapNode node = SiteMap.Provider.FindSiteMapNode(_httpContext);
                if (node == null)
                    throw new UnauthorizedAccessException();


            }
        }

        public void Dispose()
        {
        }

    }

      

        
        
        
      

    

My question is, do I need to translate init from every page to boot, or is there a way to set IIS to do this automatically on every boot.

This question is probably very dumb ....