The conditions for not carrying out site visits referred to in Article 31(1) are any of the following:

1. (1)

   the verification concerns a category A installation referred to in Article 19(2)(a) of Implementing Regulation (EU) 2018/2066 or a category B installation referred to in Article 19(2)(b) of that Implementing Regulation whereby:

   1. (a)

      the installation has only one source stream as referred to in Article 19(3)(c) of Implementing Regulation (EU) 2018/2066 which is natural gas, or one or more de minimis source streams which aggregated do not exceed the threshold for de minimis source streams laid down in Article 19 of Implementing Regulation (EU) 2018/2066;

   2. (b)

      the natural gas is monitored through fiscal metering which is subject to an appropriate legal regime for the control of fiscal meters and meets the required uncertainty levels related to the applicable tier;

   3. (c)

      only default values for the calculation factors of natural gas are applied;

2. (2)

   the verification concerns a category A installation referred to in Article 19(2)(a) of Implementing Regulation (EU) 2018/2066 or a category B installation referred to in Article 19(2)(b) of that Implementing Regulation whereby:

   1. (a)

      the installation has only one source stream which is a fuel without process emissions, and that fuel is either a solid fuel directly combusted in the installation without intermediate storage, or a liquid or gaseous fuel for which there may be intermediate storage;

   2. (b)

      the activity data related to the source stream is monitored by using one of the following methods:

      1. (i)

         fiscal metering method which is subject to an appropriate legal regime for the control of fiscal meters and meets the required uncertainty levels related to the applicable tier;

      2. (ii)

         method based solely on invoice data taking into account stock changes if relevant;

   3. (c)

      only default values for calculation factors are applied;

   4. (d)

      the competent authority has allowed the installation to use a simplified monitoring plan in accordance with Article 13 of Implementing Regulation (EU) 2018/2066;

3. (3)

   the verification concerns an installation with low emissions as referred to in Article 47(2) of Implementing Regulation (EU) 2018/2066 and paragraphs (a) to (c) of point 2 are applicable.

4. (4)

   the verification concerns an installation located on an unmanned site whereby:

   1. (a)

      telemetered data from the unmanned site is sent directly to another location where all data is processed, managed and stored;

   2. (b)

      the same person is responsible for all data management and recording for the site;

   3. (c)

      the meters have already been inspected on site by the operator or a laboratory in accordance with Article 60 of Implementing Regulation (EU) 2018/2066 and a signed document or date-stamped photographic evidence provided by the operator demonstrates that no metering or operational changes have occurred at the installation since that inspection;

5. (5)

   the verification concerns an installation located on a remote or inaccessible site, in particular an off-shore installation, whereby:

   1. (a)

      there is a high level of centralisation of data collected from that site and transmitted directly to another location where all the data is processed, managed and stored with good quality assurance;

   2. (b)

      the meters have already been inspected on site by the operator or a laboratory in accordance with Article 60 of Implementing Regulation (EU) 2018/2066 and a signed document or date-stamped photographic evidence provided by the operator demonstrates that no metering or operational changes have occurred at the installation since that inspection.

Point (2) may also be applied if, in addition to the source stream as referred to in point (a) of that point, the installation uses one or more de minimis source streams which aggregated do not exceed the threshold for de minimis source streams laid down in Article 19 of Implementing Regulation (EU) 2018/2066.