diff --git a/pkg/analyzer/cel_filter.go b/pkg/analyzer/cel_filter.go
index 42db95e..6126016 100644
--- a/pkg/analyzer/cel_filter.go
+++ b/pkg/analyzer/cel_filter.go
@@ -9,6 +9,7 @@ import (
 	"github.com/safedep/vet/pkg/analyzer/filter"
 	"github.com/safedep/vet/pkg/common/logger"
 	"github.com/safedep/vet/pkg/models"
+	"github.com/safedep/vet/pkg/readers"
 )
 
 type celFilterAnalyzer struct {
@@ -48,7 +49,7 @@ func (f *celFilterAnalyzer) Analyze(manifest *models.PackageManifest,
 	logger.Infof("CEL filtering manifest: %s", manifest.Path)
 	f.stat.IncScannedManifest()
 
-	for _, pkg := range manifest.Packages {
+	readers.NewManifestModelReader(manifest).EnumPackages(func(pkg *models.Package) error {
 		f.stat.IncEvaluatedPackage()
 
 		res, err := f.evaluator.EvalPackage(pkg)
@@ -59,19 +60,21 @@ func (f *celFilterAnalyzer) Analyze(manifest *models.PackageManifest,
 				pkg.PackageDetails.Name,
 				pkg.PackageDetails.Version, err)
 
-			continue
+			return nil
 		}
 
 		if res.Matched() {
 			// Avoid duplicates added to the table
 			if _, ok := f.packages[pkg.Id()]; ok {
-				continue
+				return nil
 			}
 
 			f.stat.IncMatchedPackage()
 			f.packages[pkg.Id()] = pkg
 		}
-	}
+
+		return nil
+	})
 
 	return f.notifyCaller(manifest, handler)
 }
diff --git a/pkg/analyzer/cel_filter_suite.go b/pkg/analyzer/cel_filter_suite.go
index 13153c8..158347b 100644
--- a/pkg/analyzer/cel_filter_suite.go
+++ b/pkg/analyzer/cel_filter_suite.go
@@ -10,6 +10,7 @@ import (
 	"github.com/safedep/vet/pkg/analyzer/filter"
 	"github.com/safedep/vet/pkg/common/logger"
 	"github.com/safedep/vet/pkg/models"
+	"github.com/safedep/vet/pkg/readers"
 )
 
 type celFilterMatchedPackage struct {
@@ -62,7 +63,7 @@ func (f *celFilterSuiteAnalyzer) Analyze(manifest *models.PackageManifest,
 	logger.Infof("CEL Filter Suite: Analyzing manifest: %s", manifest.Path)
 
 	f.stat.IncScannedManifest()
-	for _, pkg := range manifest.Packages {
+	readers.NewManifestModelReader(manifest).EnumPackages(func(pkg *models.Package) error {
 		f.stat.IncEvaluatedPackage()
 
 		res, err := f.evaluator.EvalPackage(pkg)
@@ -73,13 +74,15 @@ func (f *celFilterSuiteAnalyzer) Analyze(manifest *models.PackageManifest,
 				pkg.PackageDetails.Name,
 				pkg.PackageDetails.Version, err)
 
-			continue
+			return nil
 		}
 
 		if res.Matched() {
 			f.queueMatchedPkg(pkg, res.GetMatchedFilter().Name())
 		}
-	}
+
+		return nil
+	})
 
 	if f.failOnMatch && (len(f.matchedPackages) > 0) {
 		handler(&AnalyzerEvent{
diff --git a/pkg/exceptions/utils.go b/pkg/exceptions/utils.go
new file mode 100644
index 0000000..903ed88
--- /dev/null
+++ b/pkg/exceptions/utils.go
@@ -0,0 +1,31 @@
+package exceptions
+
+import (
+	"github.com/safedep/vet/pkg/common/logger"
+	"github.com/safedep/vet/pkg/models"
+)
+
+// AllowedPackages iterates over packages in the manifest and call handler
+// only for packages not in the exempted by exception rules
+func AllowedPackages(manifest *models.PackageManifest,
+	handler func(pkg *models.Package) error) error {
+	for _, pkg := range manifest.Packages {
+		res, err := Apply(pkg)
+		if err != nil {
+			logger.Errorf("Failed to evaluate exception for %s: %v",
+				pkg.ShortName(), err)
+			continue
+		}
+
+		if res.Matched() {
+			continue
+		}
+
+		err = handler(pkg)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
diff --git a/pkg/models/models.go b/pkg/models/models.go
index 83a171a..17dbddf 100644
--- a/pkg/models/models.go
+++ b/pkg/models/models.go
@@ -75,6 +75,12 @@ func (p *Package) Id() string {
 	return strconv.FormatUint(h.Sum64(), 16)
 }
 
+func (p *Package) ShortName() string {
+	return fmt.Sprintf("pkg:%s/%s@%s",
+		strings.ToLower(string(p.Ecosystem)),
+		strings.ToLower(p.Name), p.Version)
+}
+
 func NewPackageDetail(e, n, v string) lockfile.PackageDetails {
 	return lockfile.PackageDetails{
 		Ecosystem: lockfile.Ecosystem(e),
diff --git a/pkg/readers/pm.go b/pkg/readers/pm.go
new file mode 100644
index 0000000..3737b3e
--- /dev/null
+++ b/pkg/readers/pm.go
@@ -0,0 +1,18 @@
+package readers
+
+import (
+	"github.com/safedep/vet/pkg/exceptions"
+	"github.com/safedep/vet/pkg/models"
+)
+
+type packageManifestReader struct {
+	manifest *models.PackageManifest
+}
+
+func NewManifestModelReader(manifest *models.PackageManifest) PackageReader {
+	return &packageManifestReader{manifest: manifest}
+}
+
+func (r *packageManifestReader) EnumPackages(handler func(pkg *models.Package) error) error {
+	return exceptions.AllowedPackages(r.manifest, handler)
+}
diff --git a/pkg/readers/reader.go b/pkg/readers/reader.go
new file mode 100644
index 0000000..925c200
--- /dev/null
+++ b/pkg/readers/reader.go
@@ -0,0 +1,16 @@
+package readers
+
+import "github.com/safedep/vet/pkg/models"
+
+// Contract for implementing package manifest readers such as lockfile parser,
+// SBOM parser etc. Reader should stop enumeration and return error if handler
+// returns an error
+type PackageManifestReader interface {
+	EnumManifests(func(*models.PackageManifest) error) error
+}
+
+// Contract for implementing a package reader. Enumerator should fail and return
+// error if handler fails
+type PackageReader interface {
+	EnumPackages(func(*models.Package) error) error
+}
diff --git a/pkg/reporter/console.go b/pkg/reporter/console.go
index 9793704..e67466d 100644
--- a/pkg/reporter/console.go
+++ b/pkg/reporter/console.go
@@ -11,6 +11,7 @@ import (
 	"github.com/safedep/vet/pkg/analyzer"
 	"github.com/safedep/vet/pkg/models"
 	"github.com/safedep/vet/pkg/policy"
+	"github.com/safedep/vet/pkg/readers"
 )
 
 type consoleReporter struct{}
@@ -29,9 +30,10 @@ func (r *consoleReporter) AddManifest(manifest *models.PackageManifest) {
 	tbl.SetStyle(table.StyleLight)
 
 	tbl.AppendHeader(table.Row{"Package", "Attribute", "Summary"})
-	for _, pkg := range manifest.Packages {
+	readers.NewManifestModelReader(manifest).EnumPackages(func(pkg *models.Package) error {
 		r.report(tbl, pkg)
-	}
+		return nil
+	})
 
 	fmt.Print(text.Bold.Sprint("Manifest: ", text.FgBlue.Sprint(manifest.Path)))
 	fmt.Print("\n")
diff --git a/pkg/reporter/summary.go b/pkg/reporter/summary.go
index e24487b..09b3933 100644
--- a/pkg/reporter/summary.go
+++ b/pkg/reporter/summary.go
@@ -14,6 +14,7 @@ import (
 	"github.com/safedep/vet/pkg/analyzer"
 	"github.com/safedep/vet/pkg/models"
 	"github.com/safedep/vet/pkg/policy"
+	"github.com/safedep/vet/pkg/readers"
 )
 
 const (
@@ -72,13 +73,14 @@ func (r *summaryReporter) Name() string {
 }
 
 func (r *summaryReporter) AddManifest(manifest *models.PackageManifest) {
-	for _, pkg := range manifest.Packages {
+	readers.NewManifestModelReader(manifest).EnumPackages(func(pkg *models.Package) error {
 		r.processForVulns(pkg)
 		r.processForPopularity(pkg)
 		r.processForVersionDrift(pkg)
 
 		r.summary.packages += 1
-	}
+		return nil
+	})
 
 	r.summary.manifests += 1
 }
diff --git a/pkg/scanner/scanner.go b/pkg/scanner/scanner.go
index b86e7c8..5751060 100644
--- a/pkg/scanner/scanner.go
+++ b/pkg/scanner/scanner.go
@@ -7,6 +7,7 @@ import (
 	"github.com/safedep/vet/pkg/common/logger"
 	"github.com/safedep/vet/pkg/common/utils"
 	"github.com/safedep/vet/pkg/models"
+	"github.com/safedep/vet/pkg/readers"
 	"github.com/safedep/vet/pkg/reporter"
 )
 
@@ -217,9 +218,10 @@ func (s *packageManifestScanner) enrichManifest(manifest *models.PackageManifest
 
 	q.Start()
 
-	for _, pkg := range manifest.Packages {
+	readers.NewManifestModelReader(manifest).EnumPackages(func(pkg *models.Package) error {
 		q.Add(pkg)
-	}
+		return nil
+	})
 
 	q.Wait()
 	q.Stop()