diff --git a/v2_parsed_consent.go b/v2_parsed_consent.go
index 17cca34..e2fb606 100644
--- a/v2_parsed_consent.go
+++ b/v2_parsed_consent.go
@@ -285,6 +285,19 @@ func (p *V2ParsedConsent) PurposeAllowed(ps int) bool {
 	return true
 }
 
+// EverySpecialFeaturesOptInGiven returns true iff every feature number in specialFeatures exists in
+// the V2ParsedConsent, otherwise false.
+func (p *V2ParsedConsent) EverySpecialFeaturesOptInGiven(specialFeatures []int) bool {
+	for _, specialFeature := range specialFeatures {
+		if !p.SpecialFeaturesOptIn[specialFeature] {
+			return false
+		}
+	}
+	return true
+}
+
+
+
 // VendorAllowed returns true if the ParsedConsent contains affirmative consent
 // for VendorID |v|.
 func (p *V2ParsedConsent) VendorAllowed(v int) bool {
diff --git a/v2_parsed_consent_test.go b/v2_parsed_consent_test.go
index 8d6a4cd..bda4b54 100644
--- a/v2_parsed_consent_test.go
+++ b/v2_parsed_consent_test.go
@@ -100,9 +100,48 @@ func (p *V2ParsedConsentSuite) TestPurposeAllowed(c *check.C) {
 	}
 }
 
-func (v *V2ParsedConsentSuite) TestVendorAllowed(c *check.C) {
-	var tcs = []struct {
-		vendor  int
+func (v  *V2ParsedConsentSuite) TestEverySpecialFeatureOptInGiven(c *check.C) {
+	var tcs = []struct{
+		specialFeatures []int
+		specialFeatureOptIn map[int]bool
+		exp bool
+	}{
+		{
+			specialFeatures: []int{1, 2, 3},
+			specialFeatureOptIn: map[int]bool{1: true, 2: true, 3: true},
+			exp: true,
+		},
+		{
+			specialFeatures: []int{1, 2, 3},
+			specialFeatureOptIn: map[int]bool{1: true, 2: true, 3: false},
+			exp: false,
+		},
+		{
+			specialFeatures: []int{1, 2, 3},
+			specialFeatureOptIn: map[int]bool{1: true, 2: true},
+			exp: false,
+		},
+		{
+			specialFeatures: []int{1, 2},
+			specialFeatureOptIn: map[int]bool{1: true, 2: true, 3: true},
+			exp: true,
+		},
+	}
+
+	for _, tc := range tcs {
+		c.Log(tc)
+
+		var pc = &iabconsent.V2ParsedConsent{
+			SpecialFeaturesOptIn: tc.specialFeatureOptIn,
+		}
+
+		c.Check(pc.EverySpecialFeaturesOptInGiven(tc.specialFeatures), check.Equals, tc.exp)
+	}
+}
+
+func (v  *V2ParsedConsentSuite) TestVendorAllowed(c *check.C) {
+	var tcs = []struct{
+		vendor int
 		isRange bool
 		entries []*iabconsent.RangeEntry
 		vendors map[int]bool