How to prevent inheritance for web.config file for "configSections"?

I have following in my parent web applications config file

<configuration>
  <configSections>
    <sectionGroup name="testmodule">
      <section name="testmodule" type="RewriteModule.RewriteModuleSectionHandler, RewriteModule"/>
    </sectionGroup>
  </configSections>
</configuration>

i want to prevent child subfolders from inheriting this config section where should i put <location path="." inheritInChildApplications="false">, since config sections should be first child element of configuration file