100 grans carbon di sulphide per cubic meter for 24 hours, or 8 grans 
hydrocyanic acid gas per cubic meter with a vacuum of 400 ixi at sea 
level with an exposure of 1 hour, or disinfection with hot water, 
with compounds of mercury, or with formalin, or whether the entry 
of the product should be refused. 
Art. 8. The cost of fumigation or disinfection, and of labor 
incidental to inspection made at the port or customhouse of entry, 
with the exception of the inspector's services, will be borne oy the 
consignee of the merchandise. 
This resolution becomes effective 2 months after date of pub- 
lication in the Diario Ofieial (published Nov. 10, 1934). 
Note: Since the expression, "all kinds of agricultural seeds 
and products intended for propagation", appeared rather indefinite, 
an interpretation was requested. The Director de Fonento Agricola 
of the Mexican Secretaria de Agricultura y Fonento offers the follow- 
ing explanation: "The regulation covers every kind of plant product 
intended for propagation and applies also to living plants, including 
trees and shrubs, or so-called nursery stock." 
The required certification emphasizes freedom from virus 
diseases. Since infection with virus diseases can be detected by 
field inspections only, the required certificate can be issued only 
by authorized State inspection services and not by this Bureau. The 
Director adds that shipments of plant material intended for propaga- 
tion, from nurseries that are State-inspected and which are offi- 
cially recognized by the respective States, are acceptable without 
individual certificates. In other words, a seasonal State nursery 
inspection certificate is acceptable. In the absence of such certifi- 
cates, the shipper must obtain a certificate based on an inspection 
of the plants intended for exportation to Mexico and on inspections 
of those plants in the nursery during the growing season for virus 
diseases. 
Chapter V. Arts. 43 to 55 ~ n exterior quarantines 
GENERAL REGULATIONS ON EXTERIOR QUARANTINES 
Art. 43. - Exterior quarantines will be imposed against plants, 
parts, or products thereof, of foreign origin, which may be attacked 
by injurious plant diseases and pests. 
