diff --git a/spec/datetimeformat.html b/spec/datetimeformat.html
index 2519a1cc..0af22d15 100644
--- a/spec/datetimeformat.html
+++ b/spec/datetimeformat.html
@@ -73,12 +73,22 @@ <h1>InitializeDateTimeFormat ( _dateTimeFormat_, _locales_, _options_ )</h1>
         The abstract operation InitializeDateTimeFormat accepts the arguments _dateTimeFormat_ (which must be an object), _locales_, and _options_. It initializes _dateTimeFormat_ as a DateTimeFormat object. This abstract operation functions as follows:
       </p>
 
+      <p>
+        The following algorithm refers to <a href="http://www.unicode.org/reports/tr35/#Unicode_locale_identifier">UTS 35's Unicode Locale Identifier grammar</a>.
+      </p>
+
       <emu-alg>
         1. Let _requestedLocales_ be ? CanonicalizeLocaleList(_locales_).
         1. Let _options_ be ? ToDateTimeOptions(_options_, `"any"`, `"date"`).
         1. Let _opt_ be a new Record.
         1. Let _matcher_ be ? GetOption(_options_, `"localeMatcher"`, `"string"`, &laquo; `"lookup"`, `"best fit"` &raquo;, `"best fit"`).
         1. Set _opt_.[[localeMatcher]] to _matcher_.
+        1. Let _calendar_ be ? GetOption(_options_, `"calendar"`, `"string"`, *undefined*, *undefined*).
+        1. If _calendar_ does not match `type`, throw a *RangeError* exception.
+        1. Set _opt_.[[ca]] to _calendar_.
+        1. Let _numberingSystem_ be ? GetOption(_options_, `"numberingSystem"`, `"string"`, *undefined*, *undefined*).
+        1. If _numberingSystem_ does not match `type`, throw a *RangeError* exception.
+        1. Set _opt_.[[nu]] to _numberingSystem_.
         1. Let _hour12_ be ? GetOption(_options_, `"hour12"`, `"boolean"`, *undefined*, *undefined*).
         1. Let _hourCycle_ be ? GetOption(_options_, `"hourCycle"`, `"string"`, &laquo; `"h11"`, `"h12"`, `"h23"`, `"h24"` &raquo;, *undefined*).
         1. If _hour12_ is not *undefined*, then
diff --git a/spec/numberformat.html b/spec/numberformat.html
index 979c8f53..fa170b0a 100644
--- a/spec/numberformat.html
+++ b/spec/numberformat.html
@@ -49,6 +49,9 @@ <h1>InitializeNumberFormat ( _numberFormat_, _locales_, _options_ )</h1>
         1. Let _opt_ be a new Record.
         1. Let _matcher_ be ? GetOption(_options_, `"localeMatcher"`, `"string"`, &laquo; `"lookup"`, `"best fit"` &raquo;, `"best fit"`).
         1. Set _opt_.[[localeMatcher]] to _matcher_.
+        1. Let _numberingSystem_ be ? Get(_options_, *"numberingSystem"*).
+        1. If _numberingSystem_ is not *undefined*, set _numberingSystem_ to ? ToString(_numberingSystem_).
+        1. Set _opt_.[[nu]] to _numberingSystem_.
         1. Let _localeData_ be %NumberFormat%.[[LocaleData]].
         1. Let _r_ be ResolveLocale(%NumberFormat%.[[AvailableLocales]], _requestedLocales_, _opt_, %NumberFormat%.[[RelevantExtensionKeys]], _localeData_).
         1. Set _numberFormat_.[[Locale]] to _r_.[[locale]].