• Date
• Interpretation

• Date
  1982-03-05
• Interpretation
  NO.173

• Date
  1981-12-18
• Interpretation
  NO.172

• Date
  1981-10-23
• Interpretation
  NO.171

• Date
  1981-09-25
• Interpretation
  NO.170

• Date
  1981-07-31
• Interpretation
  NO.169

• Date
  1981-05-08
• Interpretation
  NO.168

• Date
  1981-03-13
• Interpretation
  NO.167

• Date
  1980-11-07
• Interpretation
  NO.166

• Date
  1980-09-12
• Interpretation
  NO.165

• Date
  1980-07-18
• Interpretation
  NO.164

• Date
  1980-06-20
• Interpretation
  NO.163

• Date
  1980-04-25
• Interpretation
  NO.162

• Date
  1980-01-18
• Interpretation
  NO.161

• Date
  1979-12-21
• Interpretation
  NO.160

• Date
  1979-09-21
• Interpretation
  NO.159

• Date
  1979-06-22
• Interpretation
  NO.158

• Date
  1979-04-13
• Interpretation
  NO.157

• Date
  1979-03-16
• Interpretation
  NO.156

• Date
  1978-12-22
• Interpretation
  NO.155

• Date
  1978-09-29
• Interpretation
  NO.154